Beige stain on 93r

[Jorge_Stolfi]

For all we know, the ink was knocked over while the painter wasn't actively working on the page. By himself or another person moving around the room, or even a cat.

Maybe... But the longer the spilled paint sat over the inked text and drawings and the green-painted area, the worse the damage to them would have been.  Since the damage seems to have been small -- only a bit of pigment carried away to (X), I would guess that the paint was mopped up a few minutes after the spill.

All the best, --stolfi