Category Archives: Historical Ciphers

Sometimes the biggest issues can hinge on the smallest questions.

It seems that, from Rene Zandbergen’s recollection of this week’s press conference, the Voynich Manuscript’s inks and paints are merely consistent with its vellum’s radiocarbon dating. Naturally, for the ‘smoking gun’ brigade, that alone is insufficient proof to rule out any later dates for the creation of the VMs. The argument against consistency goes that the VMs could have been made decades later, if not centuries… as long as you are happy to accept the putative existence of a über-sophisticated and determined reconstructionist hoaxer producing a simulacrum of something that never actually existed in the first place, producing language-like text by means as yet unknown. 🙂

Even though I’m sometimes painted as the ‘solo voice of the Voynich mainstream’ (unpick that knot!) which would seem to place me in diametric opposition to such “Matrix”-like simulatory claims, I am actually sympathetic to many key aspects. For example, Barbara Barrett has argued passionately for a 12th century date for the VMs, and I can quite see how a lot of the VMs’ visual content does appear to her to match many of the tropes and techniques of the period: from my point of view (and taking the dating evidence into account), the VMs does seem to contain some kind of post-1400 “appeal to antiquity”, insofar as it appears older than it is.

But I came to that position for other reasons. For me, the key statistical and palaeographic evidence that independently led me there came from the “aiiv” and “aiir” letter-groups, which very closely resemble medieval [quire + folio + side] page references, but whose usage statistics are completely inconsistent with their being page references. I find it basically impossible to believe that this pattern arose simply by chance: in fact, in a tricksy (but logical) writing system as spare and tight as Voynichese, I strongly argue that this can only have been by deliberate design. And so I would say that there is an appeal to antiquity built right in to the cipher alphabet’s construction – a kind of “quasi-historical covertext conceit“, if you like.

Hence, I am receptive to the idea that the Voynich was in some way constructed to appear older than it actually was: and so the suggestion that the maker bought in old vellum to help “sell” that idea would fit naturally into this whole misdirection. So I can’t honestly say that this isn’t (to at least some degree) the case here – the whole furore over the Vinland Map is an example of how the same forensic science looking at an artefact from the same period can remain contested for decades.

Unfortunately, this means that radiocarbon dating is therefore only part of the codicological story, and we need to take a slightly wider view of the evidence in order to move things forward. I think the right question to be asking is: if the vellum was made [possibly much] earlier than it was used, what physical processes happened to it inbetween times… and can we test for those (either by their presence or their absence)?

For example, was vellum stored flat, folded, or cut?

1. If vellum was stored cut, then we should test the age of the extremely unusually-shaped Q9 sexfolio or the nine-rosette page, because these would have had to have been made specially.
2. If vellum was stored folded, then I suspect that this would leave stress lines along the fold marks that would be visible under X-ray on the larger sheets.
3. If vellum was stored flat, then I suspect that this might lead to a difference in physical properties of the two sides – the uppermost might have “aged” more from greater physical exposure?

The issue here is that I strongly suspect that vellum was in almost all cases stored cut: whenever I have read about caches of old vellum appearing, it is in the form of cut sheets. This would seem to match the three-stage business process used to make leather in the later Middle Ages, for which my source is the account of the Barcelonan leather trades in p.97 of James Amelang’s fascinating “The Flight of Icarus” (1998):-

First […] were the blanquers (in Castilian, curtidores), who purchased raw hides from butchers or from livestock brokers in the countryside and took the initial steps to convert them into leather. The next stage of preparation was presided over by the assaonadors (Cast. zurradores), who curried or dressed the skins the blanquers partially processed. At the far end stood various individual trades which specialized in finished products ready for sale: cordwainers […], embossers, makers of saddles, harnesses, reins, gloves, and parchment, and, above, all, shoemakers and cobblers.

Amelang goes on to point out that the most economically powerful group were the blanquers, because of “the higher capital requirements of their wholesale dealings in hides and other supplies, including sumac, alum […] and other dressing products”.

To me, what this means is that medieval parchment makers had probably always eked out a fairly marginal existence: furthermore given that paper had become so affordable (and was becoming ever cheaper), the mid-Quattrocento parchment trade must have been pretty much dying on its feet. Hence, I really don’t see parchment makers themselves holding large stocks of uncut parchment for decades: rather, I would expect to see caches of cut parchment sitting around on shelves or cases in monasteries and administration centres.

Hence, I would argue that the key test here would be what the dating was for any of the unusually shaped pages, because these would most likely have had to have been made specially for the VMs. Hopefuly we will find out soon which particular four bifolios were tested…