|A printed leaf from 1496.|
When I was at the Texts and Contexts conference last fall, I heard an interesting paper about "tree-structure" marginal notes in medieval manuscripts, and though it is small, I was glad to come across an example of such marginalia, as can be seen in the lower margin of the leaf in my image here.
I was especially interested, of course, because of my recent interest in two-dimensional textual structures: these diagrams make meanings through structures than cannot be readily reduced to linearity.
Crazy, I know, but that's the kind of thing I find interesting.
As always, if you see something of interest, the catalogue should give you all of my contact information.