This is the official event poster for the Thursday June 18 lecture at 7 PM
Key here is that the lecture will be Live Streamed allowing my far flung readers to view it!
www.youtube.com/@friendsofthemuseum
Darrell Markewitz is a professional blacksmith who specializes in the Viking Age. He designed the living History program for L'Anse aux Meadows NHSC (Parks Canada) and worked on a number of major international exhibits. A recent passion is experimental iron smelting. 'Hammered Out Bits' focuses primarily on IRON and the VIKING AGE
This is the official event poster for the Thursday June 18 lecture at 7 PM
Key here is that the lecture will be Live Streamed allowing my far flung readers to view it!
www.youtube.com/@friendsofthemuseum
Just how do you take natural ores and render them down into working metal bars?
Since 2001, artisan blacksmith Darrell Markewitz has sought to recover lost methods of bloomery iron smelting at his Wareham (lower Grey County) workshop. Starting with a project for Parks Canada at L’Anse aux Meadows NHSC, his investigation has grew to 100 experimental firings, and lead to conference presentations, academic papers, and project work in Canada, the USA, Europe and Scotland. A well experienced presenter, this lecture will also serve as the book launch for ‘20 Years Before the Blast’ Experimental Bloomery Iron Smelting – 2001 – 2024
Lecture format (roughly 60 minutes, plus Q & A) including physical samples to examine.
Annesley United is located on the west side of Highway 10 (Toronto Street), just at the crest of the hill as you come into Markdale from the south side - just at the first stop light. There would be ample parking in the mall lot across the street.
For the last year, I have been in discussion with Scott Nickles at his Sanctuary Armoury property about adding improvements to his property - in mind of his desire to create a more interesting historic reservation' for living history groups. Scott, who specializes in combat ready custom armours based on the 1400's (what I would call transitional plate) has been heavily involved with the HEMA community. To that end he has been hosting camping events, and this has expanded to include the SCA's Trillium War event over Canada Day week.
To that end, this year I will be working along with the Sanctuary Armoury team to build and equip a small blacksmith's shop out in the historic area. This will be the first permanent structure, hopefully of other seasonal use facilities built by the participating groups.
The blacksmith's shop will be a small, pole / timber framed structure, only 10 x 12 feet in foot print. With a dirt floor (ideal for a forge) and no power or water installed, the scale avoids permit problems.
![]() |
| Sanctuary Blacksmith - tentative layout |
You can see the arrangement of the forge and master anvil is fairly tight. (Worth noting that my own principle forge room at Wareham is roughly 12 x 15 feet, which includes four powered tools and a second propane forge.)
One major difference is that this forge will feature a great bellows for the air delivery. Years ago I had been given a quite old (late 1800's?) antique great bellows by my friend Kary Bates. Over the last two months I have been attempting to re-condition the dried out leathers, so to put the unit back into working order. I have been somewhat successful in this - at least to the point that the bellows can deliver a short air blast. (see below) The hope is that with use the leathers will soften a bit more.
One of the features of this layout is that the two side walls have sections at a fixed four feet, then panels hinged at the top which lift up to both permit viewing and create small sun / rain shelters. The wide front doors have a third 4 x 8 panel, also hinged at top, which acts to extend the enclosed space further, the top hinged 'roof' resting on the two open door panels.
I had a spare lower input to ash trap casting, which I was able to mount with two bolts (the holes only roughly matched) to the bottom of the bowl. For the air entry I took a piece of 1/8 inch plate and drilled a number of 3/8 holes. My experience with shallow dish forges has proven that encasing the air entry within a circle of 2 inch x 1/4 thick greatly improves the fire performance. I had a large quantity of low density fire brick on hand, which I cut and sculpted to raise the effective floor of the fire. When I deliver and install the unit, I will mount the bricks securely in a clay matrix. Further boxing of the fire is via a set of high density bricks around the sides and back as seen. (Use of the broken brick at the rear is intentional, this allows for one section to be removed when heating longer objects.
I undertook a short test firing of the whole assembly yesterday. Since there was no ventilation inside the main part of the workshop understandably coal smoke was a problem! I started the fire through the initial coking up, and made a very quick needle poker tool.
I suspect the antique bellows may have a valve problem between the bottom inlet bag and the top output bag. The top was only lofting about the same amount as the bottom was delivering. Together this means the air blast is pulsing with each stroke, not the longer continuous blast normal with a great bellows. This may limit the overall size of the heat zone for larger work.
Even with the bricks raising the level of the fire, I found that the working bar sat at too steep an angle. (The depth of the cast bowl is about five inches.) To help flatten the position of a bar, I cut a slot about four inches wide by 2 inches deep into the very front of the bowl (would be at the front right of that image)
The overall result is not quite as effective as I would like. Although I originally learned on a great bellows system, that was a * lot * of years ago, and I will need to remember the subtlety of use. Every air delivery system has it's own quirks. One of the largest draw backs to any human powered system is that it chains you to the forge.
Canadian IRON Symposium
September 4 - 7 (Labour Day)
Sanctuary Armoury - outside Peterborough ON
https://www.warehamforge.ca/Canadian-Iron/index.html
The focus on this event will be on ORES.
Participants will construct a proven 'short shaft' bloomery iron furnace, but each team will work with a different iron ore type. This will include natural source, commercially prepared and analog ores. Each team will be provided with at least 25 kg of their ore (in some cases additional will be available). Each type has it's own wrinkles towards creation of the best possible bloom.
This is an ancient Fe2O3 rock ore, used for the pioneering work by Lee Sauder and Skip Williams. The reported elemental iron concentration is in the range of 59%. The material on hand was gathered by myself at the abandoned Bratton's Run Colonial era mine, so the quality should be considered random and lower. There is a quantity on hand that has been both roasted and broken for size. Although there is more than enough of the raw stones available to support two more smelts, these will need to be roasted and broken still.
DARC Red Analog - Pottery Supply
This is the standard Fe2O3 analog for Bog Iron Ore, used for the bulk of the experiments at the Wareham Forge. In the form provided, the elemental iron concentration is roughly 54%. The fine 'Spanish Red' powder, available from pottery suppliers, is mixed wet with 10% flour as a binder, then dried into lumps ready for the furnace.
This is an alternate analog, made from Fe3O4, again tested in our smelts. As mixed, the elemental iron content is roughly 60% (an excellent ore). Another fine powder, mixed with flour binder. Also available at pottery suppliers, this oxide is considerably cheaper (now) that the red.
This material is ground down from hematite ore from Quebec into very fine particles, and is sold as a sand blasting grit. An extremely pure Fe3O4, with an elemental iron content of 69%. The lack of silica combined with small particle size can make this ore tricky within these furnaces, without care to air / burn rate / temperature, cast iron can be created. With the addition of some additional sand for slag, this ore is most likely to produce higher carbon iron.
Individuals wishing to bring their own local ores for test smelting are more than welcome to do so! Be aware however, that each ore can rely on variations on furnace set up and method for best results. Any ore without at least 50% elemental iron content is unlikely to produce much by way of a workable iron bloom. At least 20 kg of a good quality ore is required.
Canadian Iron Smelting Symposium
Labour Day
September 4 – 7 (Friday to Monday) 2026
Sanctuary Armoury
1504
Cameron Line
Hastings, Ontario
(about 20 minutes East of Peterborough, just south of highway 7)
This will be a practical workshop style event, individual teams of 3 – 4 persons building, repairing, then firing their own 'short shaft' bloomery furnace. Using 25 kg of ore, each team will create a bloom in the 3 – 5 kg range, which will be divided between that team.
The focus of this event will be on ores, with four different ore bodies provided, assigned one to each team :
- 'Lexington Brown' – Limonite rock ore from south Virginia
- Granular Hematite – a fine, high elemental iron content material used for sand blasting
- Red 'Bog Ore Analog – an Fe2O3 material well proven in past tests
- Black Analog – an Fe3O4 material similar to the red, but with higher elemental iron
- Any formed teams who wish to bring there own local iron ores to test smelt are very welcome to do so!
- Additional amounts of Limonite will be available for those who want to double up or aim for a large ore amount bloom!
Event cost : $ 310 CDN per working participant
This covers ore, furnace materials and the 50 kg charcoal per team.
All a the basic tools needed for the build and smelt will be provided.
Registration limited to 20 individuals
There is no prerequisite for smelting or metal working experience !
Paid Registration Deadline is August 1, 2026
'Primitive' Camping spaces available on site (see detail below)
This event takes place rain or shine!
(Overhead covers will be provided in the smelting area)
Proposed Schedule :
Friday : Arrive and set your camp
Welcome BBQ
Discussion of the basic furnace design and method
Saturday : Roast and crush ores (only required for Limonite)
Crush and screen charcoal
Prepare clay / sand / organics mixture
Build the furnace
Cut tapping and extraction arches, mount tuyere
Gentle drying fire into the evening
Sunday : Workspace preparation
Initial pre-warming fire
Full ore to bloom smelting sequence (typically 5 – 6 hours)
Extraction and initial compaction
Monday : General workspace clean up
There will be limited opportunity to render bloom pieces down into working bars. One equipped coal forge on site, possibility to construct simple ground mounted charcoal trough forges. (anvils may be in short supply however).
Pack camp and depart as travel requires.
Primitive Camping?
The Sanctuary Armoury site has roughly 100 acres of rolling fields.
- There will be adequate space for parking. Space will be set aside for those who bring Rvs.
- Individuals should provide their own tents and general camping equipment.
- There will be one large communal fire pit, but generally you should provide your own cooking stoves. (At this point it is unlikely any on site food will be available).
- The camping area will be separate from the smelting area
- Potable water will be available at both areas
- Portable Toilets will be set at both the camp and the smelting areas
- There will be no provision for electric power in the camping area
Personal equipment?
Iron smelting is both dirty and has the presence of charcoal sparks :
- Older working clothes are wise. A cap is a good idea! Long sleeves strongly recommended.
- Boots : all participants are required to wear leather boots that come up above the ankle (and under the pant leg).
- Safety Glasses : Minimum polycarbonate to be worn at all times in the smelting area. Those with there own safety glasses are recommended, especially for those who use prescription lenses. A limited quantity of simple safety glasses will be on hand
- Leather Gloves : Those who have their own work gloves are asked to bring these.
- Leather Aprons : Not absolutely required, but it is suggested those who have these do bring them.
- Extraction Safety : There will be two very basic sets of fire resistant gear (jacket / body plus greaves, gauntlets, full face shields). These will need to be quickly shared between the teams as extraction time arrives.
'Non Participant Observers'
There is no particular reason family members or partners should
not be able to attend if desired :
- registration of individuals will be required (mainly so I can
track numbers).
-
any children must be under direct adult supervision at all
times.
- within the smelting area in general, the same requirements for
dress and safety eyeware will apply.
- No unsupervised general access to the individual furnaces (the
same 3 meter circle we insist on at public demos)
- Minimal fee will be charged to adults (+18). This to cover
the cost of the Friday BBQ, and the probable renting of a third
port-a-john. Likely to be $30 for the full 4 days, but this will
depend on numbers.
There is no current consideration of this being an 'open to the
public' event.
At this point the payment method has not been established.
Those interested should contact Darrell Markewitz (below) to express their intent.
A minimum paid registration of 12 individuals is required for this event to proceed.
Your Hosts for this Event ?
Darrell Markewitz
519-923-9219
www.warehamforge.ca/Canadian-Iron
(web site has location via Google Maps)
|
|||||||||||
|
At this early date, I am considering a paper loosely titled 'Presenting the Norse'.
This would be an update on two early papers, at ALHFAM - 1998, and the Viking Millennium Conference - 2000. Now with over 30 years since the original 'Norse Encampment' demonstration at Orangeville in 1993, there is some value in reflecting on all the experiences presenting via living history.
"Lessons from the Viking Age' - 1998
C.A.M.E.L.O.T. is a medieval and experimental archaeology conference happening on Sunday 21 September 2025 (8:30 - 5:30) at St. Jerome's University in the University of Waterloo.
https://www.dragenlab.ca/camelot-conference
Session SJ2 2001 - 11:45
'20 Years Before the Blast' - Experimental Bloomery Iron Smelting 2001-2024
" Independent
Researcher Darrell Markewitz will present a brief overview of his
recently published book of the same name, considering what has been
learned from 100 individual bloomery iron smelts. These experimental
tests focus on historic methods from Northern Europe, loosely
post Roman through to the Early Medieval adoption of water powered
equipment. Topics will include variations in furnace builds, the
influences of air
delivery systems and individual ores.
There will be summaries of that was learned from projects based on
specific archaeology; Vinland, Icelandic and Pictish furnaces, and a
consideration of bloom quality into the final ‘bloom to bar’
stage. "
Display Table (all day)
Experimental Archaeology by the Dark Ages Re-creation Company
" Both
forged iron objects and glass beads are well represented in Viking
Age sites. But how exactly
is ore turned into metal bars, or glass fused into patterned beads?
It turns out the actual equipment used is not found, and the physical
methods used are lost to time. For two decades, members of the Dark
Ages Re-creation Company, a living history group focused on the
Norse, have undertaken an extensive investigation into bloomery iron
smelting and glass bead making furnaces. A
combination of posters and display tables of physical objects
illustrates this work. "
... in early preparation for the October 13th bloomery iron smelt at Wareham
Sunday October 13
the Wareham Forge, Grey County, Ontario
All day : Early start (8 AM), expect delayed extraction (early evening)
This smelt will be a continuation of the recent evaluation of a mechanical system that mimics a Norse type twin bellows. This continues trials undertaken at Smelts 94 and 95
- Past experience with lower air volumes suggests this will be a longer and slower burn.
- This will be a roughly 20 - 22 kg ore smelt, with the expectation of a smaller (3 kg?) bloom.
- This is a fixed experiment (not teaching), but those visiting can expect the usual 'Darrell rambles on'.
- There will be limited opportunities for direct participation.
This is an 'Open Invitational' event. Contact Darrell via e-mail if you wish to attend.

Furnace base, metal form in place for first clay additions
I have positioned the furnace to the SW corner of the smelting area, back towards the low retaining wall. This will place the tuyere to the right hand side (the side seen here), with extraction towards the open side (left in image). The standard concrete half blocks used as a base plinth, packed with charcoal. I have framed up the extraction arch side (bottom made with two clay bricks) and created a pocket based with charcoal fines for the purpose of collecting tap slag.
![]() |
| First course of clay build, after form removed. |
I have been taking advantage of the atypical hot and clear weather for mid September to prepare the materials and doing the build much earlier than has been done in the past. Starting Friday past, I have made up a batch of analog, which is drying nicely in the hot sun. Two afternoons were taken to generally prepare the working area and hand shred enough dried horse manure to make up the needed two batches of the standard clay / sand / manure mixture that has become the standard here. Yesterday the first batch was made up and applied, building the bottom part of the furnace to about 20 cm tall. This mix was a bit on the soft side, so the spiral rope binding was placed a bit closer spaced than normal. This course may be left an additional day to ensure it is stable enough to support the next course addition. There is part of the wall cylinder remaining from the last smelt (94, as seen in this image). I hope to save some work and materials by trimming the edges square and placing this ring as the top section of the new build.
The intent is to retain this furnace body against future smelts. The reason for placing the furnace to one side of the area is to leave room to also construct another stone block furnace, like the one used for Smelts 82 - 84, 86, 87 (only with a bit more care to even construction). This with an eye to a potential special event marking Smelt 100 / 70th in November 2025.
As part of my recent attempt to (somewhat?) re-integrate into the Ontario (Eldormere) branch of the Society for Creative Anachronism (1) I will be mounting a bloomery iron smelt, assisted by other members of the Dark Ages Re-Creation Company.
This will take place over Friday through Sunday, June 21 - 23, at the 'Baron's Brouhaha' camping event, near Tiverton (Grey County) : https://ealdormere.ca/canton-of-northgeatham/barons-brouhaha/ With the full iron smelt happening all day Saturday June 22
![]() |
| Finished build - Smelt 85 'Bones' - June 2020 |
The Build - Will be similar to the the standard 'short shaft' used for Smelt 85 :
• clay build, mix of EPK dry clay with pulverized furnace wall material (from Smelt 94)
• set on shallow plinth of stone blocks
• base of charcoal fines, about 10 cm
• 25 cm ID / 60 - 65 cm total shaft height
• tuyere of ceramic tube, 2 cm ID
• set to 15 - 20 cm above fines, at 22 degrees down angle, 5 cm beyond interior wall
• estimated working stack height at 45 cm
• extraction arch at roughly 20 w x 10 h cm
• tapping arch at roughly 10 w x 5 h cm
The furnace will be constructed from late morning to mid day Friday. Gentle drying fire into that evening.
Test One : The use of pulverized wall material from a previously fired furnace mixed (roughly) 50/50 with fresh clay. Normally fresh material has been used for new builds, the standard mix being thirds by volume of powdered clay, course sand, and shredded horse manure. A mix using old furnace walls is the normal method used by Lee Sauder, who has excellent results, but this is the first time for our team. The expectation is some additional care needed during the initial drying stage.
![]() |
| Air set up - Smelt 90 'Wind & Weather' - October 2021 |
Air Supply - Will be similar to the arrangement used for Smelt 90, which will pair both a theoretical Norse twin bellows (enlarged for smelting) with an electric blower. This will allow alternately allowing individuals to use the bellows equipment, enabling comparison with mechanically delivered air. The bellows used had been created for the 'Vinland' series of experiments, at to date has provided air for 6 previous smelts. (2)
![]() |
| Sliding Air Gate, closed position |
The air delivered from the electric compression blower will be modified by two gates. The first will be used to set the total volume of air delivered, which has been at least roughly calibrated for 100's of litres per minute. The second gate is a sliding one, designed (??) to mimic the kind of changing 'pulse' air delivery provided by the twin bellows seen above. On a repeat cycle of roughly once per second (rate is adjustable), the gate shifts from fully open to allowing only a smaller amount of air. The main distortion is that this mechanical system does not allow for any changes in delivered pressure, which is the case for the bellows method.
Experiment Two : The sliding gate / pulse air delivery had been previously tested in Smelt 94. The intent this time is to be able to directly compare and measure the delivery from both the mechanical system and the twin bellows within the same smelting process. Past problems with instruments has meant that attempts to generate absolute numbers have been inconsistent. This test should at least be able to provide relative measurements between the two air methods, so allow for correct adjustments of the mechanical systems to the human operated bellows.
![]() |
| Richard Schweitzer operating the bellows - Smelt 44 'Vinland 5' at L'Anse aux Meadows HSC |
There will be some opportunity for observers to directly participate :
• A limited number of people can be directly involved as the working team. This can include both maintaining charcoal and ore ore additions to the furnace (two jobs).
• Throughout the smelt, large quantities of charcoal need to be broken and graded to size. Although certainly a messy task, this is something well suited to younger helpers.
• Individuals can take a turn operating the bellows. This normally undertaken on a five minute rotation.
• At the final extraction, a small group of dedicated hammer workers are required. Preference will be to those who have some related (blacksmithing) experience with sledge hammers.
![]() |
| First compaction of a bloom, well after dark - Smelt 87 '65 for 65', October 2020 |
It is expected that the use of the kind of air volumes indicated by the bellows will greatly increase the time per individual charcoal charge burning time, so extend the time required for the smelting process. (Smelt 94 required a total of 14 hours from initial pre-heat to final extraction)
This will be only the third time a full iron smelt has been undertaken at an SCA event in Eldormere. The working team from DARC to date has undertaken a total of 37 past smelts, the majority successfully resulting in iron blooms. For team leader Darrell Markewitz (aka Sylard of Eagleshaven) this will be his 95th.
Importantly, this is also a chance to see the process of experimental archaeology at work.
Notes :
1) My journey into Living History, so by extension, my independent creation of the Wareham Forge, and eventually research into bloomery iron smelting, all started with an accidental discovery of the very first SCA event in Ontario while an art student in 1976. By 2000 I had shifted my activities to the more specifically focused DARC.
2) For a commentary on previous use of various human powered air systems, see : Iron Smelting with Human Power
Practicum 2024: Back to Basics
Practicum 2024 – Back to Basics (ealdormere.ca)
Site opens: 9:30am Site closes 8:30pm
(At point of this post, class schedules have not been published)
DARC round table on the Viking Age
60 minute round table style discussion
best suits teens through adults
Norse Iron
The 'Dark Ages' are known partially through a number of truly impressive
objects made from forged iron, Sutton Hoo (Anglo-Saxon) and Oseburg
(Norse) being the best known examples. During the Viking Age, iron was
used for domestic objects, tools and weapons. Illustrated with artifact
images and physical replicas, this session will look at how iron itself
was made, the work of the blacksmith, and objects of special interest to
re-enactors.
http://www.warehamforge.ca/ENCAMPMENT/artifact.html
Note there is a slight change here, due to my own mix up with lectures at the Blue Dragon event in January!
Starting in Blacksmithing for Re-enactors (some practical advice)
60 minute illustrated lecture / discussion
best suits teens through adults
Instructor Bio
Darrell Markewitz first picked up the hammer in the late 1970's, and has
worked professionally as an artisan blacksmith since the late 1980's. He
found the Wareham Forge in 1992, specializing in 'Historic Reproductions
in Metals', with work for both major museums and individual re-enactors,
as well as private commissions for his Art Nouveau based designs. Most
significant museum work is his creation of the living history program
for Parks Canada at L'Anse aux Meadows NHSC, he has provided staff
training, physical presentations and object replicas for museums
throughout North American, in Great Britain and Europe. Since 2001, he
has undertaken personal research via experimental archaeology into
bloomery iron smelting, which has included numerous conference
presentations and academic papers.
As Sylard of Eagleshaven, he is 'Ancient of Days', holds a Laurel for
decorative metalwork, and is the original 'bastard Viking' of song and
story. He founded the Dark Ages Re-creation Company in 2000, and remains
it's driving force.
Blue Dragon Studium 3.5