116v

[N._N.]

There are several reasonable explanations for all kinds of fluid damage, too many really to narrow it down, at least without chemical analysis. Sure, it could be some fluid from alchemical experimentation that might indicate a use in this context. It may just as well be water damage from being stored in an unsuitable environment. For most of the Jesuit period of the manuscript, it probably wasn't a prized possession, but rather one of many books that had to be kept somewhere. The order's suppression certainly did not help the storage conditions either. Since the manuscript were apparently re-bound at that time, there was certainly opportunity to get coffee stains on it at a time where the drink was well established in Europe.
The most reasonable explanation is probably (possibly dirty?) water, as unusual elements in the fluid might have turned up in the recent work that Lisa Fagin Davis referenced in her talk. If I remember correctly, the research of the stains is mostly based on shape, different chemical compositions would have certainly helped.