So what is it? It is a bowed stringed instrument, fairly large, somewhere around 30-35 inches in length from the images, exclusively played gamba style (on the leg, like a cello). It seemed to most commonly have three strings, though a couple of the images show as many as five. In southern Europe there seemed to be far less distinction between it and the "normal" medieval fiddles, especially as that region more frequently played the fiddle gamba style (the Spanish rebab, Cretan/Greek lyras, Balkan gadulkas for example are all still played that way). The instrument was most likely carved from a single block of wood, as most early medieval instruments were, with an attached soundboard. The shape of the body was roughly figure eight shaped, with various waist bumps or points. From the sculptural evidence, it seems as though the instrument had both a flat soundboard (again, very typical of early medieval instruments) and a flat back (also consistent with a block carved instrument). Other elements were quite varied.
The difficulty in getting any real written evidence for its existance is that it didn't appear to have a separate name. There definitely seems to be a distinct iconographic type, but no separate word for it. We tend to run into this problem with the rebec as well, as all bowed instruments, especially in the medieval period, tended to be called some variant of fiddle (viol, viola, vielle, fiedel, etc.) indescriminately. As such we don't really have any confirmable textual evidence for the instrument (though there are lots of references to fiddles). This also includes tuning, which we'd have to make some sort of guess on based on the physical form of the instrument and the scant information we have on tuning of fiddles in general. There are no physically surviving examples.
That leaves the iconographic evidence, which I present below. I will try to point out what features seem to be relevant with each one, and then try to make some summary statements about what might be a "typical" instrument. First I will make my normal disclaimer regarding historical pictoral evidence. The artists and sculptures often worked without models, and in some cases (as is extremely evident in the beastiaries) without ever having seen the objects they are depicting. With musical instruments especially, you have to be careful in working out details from small marginal illustrations where the artist may be taking liberties for convenience or effect. For example, a harp drawn 1/4 inch high might only show six strings because that's the most the artist could physically fit into the picture. But that doesn't mean that specifically such harps only had six strings. Likewise, there are depictions of physically impossible constructions (pegs that couldn't turn or that are strangely placed; the number of strings and pegs not matching; etc.). So any consideration of iconographic evidence has to be taken with much trepidation and a good deal of salt. That said, a good deal can still be gleaned from such evidence, and, in any event, it is the only evidence we've got!
EXAMPLES IN ROUGH CHRONOLOGICAL ORDER
Below are the examples that I was able to find. The sources are noted with as much information as I could discover. Notes regarding shape and details follow. For images from which measurements could be taken, I then got some ratios. The Length to Width ratio represents (Total body lenth, from tailpeg to pegdisc)/(widest point of the instrument, usually the broadest point of the lower bout). The higher the number, the narrower the instrument. The body length to neck length ration is (Length of the soundbox portion of the instrument, from tailpeg to joint with neck)/(length of neck and pegbox, from end of the pegbox to the neck-body joint). High numbers indicate a very short neck, lower numbers a longer neck. The upper to lower bout ratio is the (width at widest point of the upper bout)/(width at widest point of the lower bout). Most of these are very close to one, as the bouts are actually usually quite close in size.




























MY RECONSTRUCTION
Given the full brunt of information above, I'm going to attempt to design a "typical" instrument. I've chosen to use a waist ornament, partially because it is more common, partially because I just like it. The bump is harder to cut than the point, but appears to be more common, so will use the bump. The pegbox will be a round disc. I've decided to use the sloping shoulder with demarcated neck joint style as a compromise of the various designs. I've also decided on the four soundholes design, though the specific shapes may change later on. I'm still torn between trying a footed bridge vs. a free-standing bridge, and will probably re-visit that issue later on when I get closer to having to make a decision. It doesn't affect the overall body design, however, so starting will the silouette form below:

The body and neck will be cut and shaped from a single block of wood, as was common in the medieval period. The bodies in the sculpture didn't look overwhelmingly deep, so I'm going to probably use only a 3" thick block. There was no fingerboard, and no break shown where a fingerboard would start/stop in any of the examples. This presents two possibilities. First would be that the instrument was hollowed from behind, with a backboard set on it. This would create no lines on the front where a soundboard would end and a fingerboard begin. However, only harps were known to have been constructed in this manner - all other stringed instruments are a hollowed box with a soundboard added as the belly, so that seems very unlikely. The other possibility is that the top-piece of wood went the entire length of the body, from the pegbox to the endnub. While this is supported by the visual evidence, has the structural oddity that you are then using a softwood as a fingerboard. Might be justified especially if the body is hollowed out almost the entire length of the neck, as in the rebec, but not quite sure on that one. Might be that the soundboard is attached, but there is no fingerboard section of it. That is, the soundboard doesn't run up past the start of the neck, with the "fingerboard" area being the hardwood of the neck itself. This would require the soundboard be inset a bit to have the soundboard flush with the neck fingerboard space, as is the case on lutes, for example. It requires a little more thought for the moment. But doesn't affect the carving of the primary block initially, so we have now to acquire the block to carve.


This is the starting block. It is about 10 inches wide, 46 inches long and about three inches thick of hard (eastern big-leaf) maple. There doesn't appear to be a lot of flame in it, but that is okay, as ultimately it will make the cutting and chiseling much easier to do. The piece was acquired from a local wood store that has some wonderful pieces of hardwood, and it weighs about 30 lbs. at the moment. There were two large knots on it, so I ended up chiseling out the smaller one a bit to make sure that it didn't go through too deeply, and it didn't. The side visible here will ultimately be the back.

First thing out was to create a template that would serve to draw out the instrument on the block. As the block is so thick, there was a danger in hand-sawing of skewing the cuts, so I needed to draw the outline on both front and back, and have them line up very carefully together. To do that, and to make sure that the instrument was actually symetrical, I did this half-plan in masonite. It will also be used to mark out the soundboard piece.

The template was used to mark out the instrument on the cleanest section of the block. I then started to do a test cut with my big saw. I discovered that, even with the new big saw, the rate of cut was about 3 inches an hour. Since I had over 100 inches of cutting to do, I kinda despaired on that, as my arm really wasn't up to doing 30 or 40 hours of cutting. To the rescue came Ken Landis, one of the Rotarians in our Camden Club, who has a full woodshop of power tools. He mostly does wood-turning and some cabinet work, and made the generous offer to use his large bandsaw to chop out the block for me.

A lesson in how power tools make things much faster. Ken was able to cut out the block rather closely with the bandsaw in about an hour. So here is the block pretty much to shape, requiring only cleanup rather than reshaping at this point. Ken then asked what my next step was in the process, at which point I noted that is was hollowing out the block, and I described my normal technique of drilling coupled with the scoop chisel. He proffered a better solution, and to the drill press we went.

Another hour with the drill press and some huge 2" boring bits and the grand majority of the hollowing was done. Functionally in one morning the power tools were able to credit an "instrument blank" that would have taken me at least 100 hours of manual work. So I consider myself seriously ahead of the game on this one. For his efforts, I gave Ken the remaining bits of wood, including the large endblock which he will probably turn into (pardoning the pun) a nice big bowl.

Still, even with the gross work done, there is a lot of work still to be done. The boring bits had a starter tip that meant that the last half-inch or so couldn't be drilled into, so at least anothe 1/2 inch of wood has to come off the bottom. The walls are about 1/2 inch or more thick, to allow for a considerable margin of error with the drills (even as it was, there was a single "skip" that is visible in the shoulder on the far side of this view). A lot of chisel work at this point. But I'll probably first cut the neck and head down in thickness to that shaping them is easier (only working with half the thickness of the wood), and then tackle the main block. I also have a new tool on the way - an Arbortech Power Chisel, which might make the whole process easier - we'll see.

In the meanwhile, I've acquired the soundboard piece from Luthier's Merchantile Inc. It's a full jumbo sized guitar soundboard, and has been edge-glued together and thinned down. The broadest single piece is only 8 inches, so to handle the 10 inch width of this instrument, I needed a joined piece. It is flat rather than arched as I believe the instruments at this time would have had a flat soundboard rather than an arched one. Presently it's about 14 inches wide, which should easily handle the size.
Next up - thinning down the neck/head and tailknob.
OTHER RECONSTRUCTIONS

Bernard Ellis's Recreation
Based on the Oakham Castle sculpture in England.
Block carved body, attached neck. Has fingerboard, tailpiece and bridge. Four D soundholes, two each in upper and lower bouts. Three strings. Bridge is low and flat.
Overall length is 94cm (37")
Width at widest bout is 54.8cm (21.5")??
String length is 62cm (24.4")

Christopher Allworth's Recreation
Based on the 12th Cent. York Psalter (King David portrait) presently at Univ. of Glasgow, MS U.2.3.
Body assembled (not block carved), attached neck. Has fingerboard, tailpiece and bridge. Two double-keyhole soundholes. Three strings, low flat bridge.
Overall length is 83cm (32.7")
Main body is 53cm (20.9") long, 27cm (10 5/8") wide
Body depth is 8.2cm (3 1/4")
Marco Salerno's Recreations:
Does three -

1. Based on 12th Cent. York Psalter (King David Portrait)
Body assembled, attached neck. Fingerboard (with gut frets), tailpiece, and high arched bridge. Soundboard also arched. Two double-keyhole soundholes, four decorative inlays. Five strings.
Overall length - guessed at about 80cm (31.5")
String sounding length (bridge to nut) 53cm (20.9").
Very deep body (about 10cm or so)

2. Based on 12th Cent. German Bible (which actually is one known to show a bridge)
Body assembled, attached neck. Fingerboard (with gut frets), tailpiece, and high arched bridge. Soundboard arched. Two closed c soundholes, five strings.
Overall length - guessed at about 94cm (37")
String sounding length (bridge to nut) 60cm (23 5/8")
Also deep body (about 10cm or so)

3. unknown source, though probably the same as above. Dimensions and shape similar to number 2. Soundholes smaller, with four small inlays as well at corners of soundboard.

Jesus Reolid's Recreation
Probably based on the Great Canterbury Psalter, c. 1180-90, Bibliotheque Nationale, Paris, but don't know for sure. Cannot get measurements or other specifics from the image on his website. Four strings, flat soundbard, attached fingerboard, bridge, endnut and tailpiece. There is a cute rosette just below the end of the fingerboard on the soundboard.

Walter Cangialosi's Recreation
Based on the 12th Cent. York Psalter (King David portrait) presently at Univ. of Glasgow, MS U.2.3.
Very nice copy, block carved with interesting approach to the body, making it shallow and rounded (there is some evidence that fiddles were shaped this way in general, though the sculptural evidence for this type of fiddle I think suggests a more square shape). I'd be particularly curious to hear how that shape makes the instrument sound (my guess would be a really interesting raspy/nasal tone). Uses attached fingerboard and a high curved bridge.

Reconstruction by ?
Based on the 12th Cent. York Psalter (King David portrait) presently at Univ. of Glasgow, MS U.2.3.
Frustratingly, I cannot find my notes as to who made this copy. What I'd consider the most accurate copy I've seen so far. Block carved, with flat front and relatively deep body, no discernable fingerboard, and low flat bridge. Not quite sure how the tailpiece is attached, but it does have a very accurate appearance. The bridge on this instrument is so low that it would be impossible to play single strings - the only option would be to play all at once.