this monk in Deventer, Netherlands around the 1400s left a manuscript he was working on unatennded and open at night; a cat (presumably allowed in the library to scare away rats and mice) pissed on the parchment, making a section of the page unusable…
This can be seen below on the right along with a picture of a cat, and two pointing hands, plus an explanation :laugh_at:
“Hic non defectus est, sed cattus minxit desuper nocte quadam. Confundatur pessimus cattus qui minxit super librum istum in nocte Daventrie, et consimiliter omnes alii propter illum. Et cavendum valde ne permittantur libri aperti per noctem ubi cattie venire possunt.”
[Here is nothing missing, but a cat urinated on this during a certain night. Cursed be the pesty cat that urinated over this book during the night in Deventer and because of it many others [other cats] too. And beware well not to leave open books at night where cats can come.]