Many years ago I used to have a collection of all the bookmarks, scraps of paper and oddments that I'd found in second hand-book. A modern artist could probably create a show from such ephemera.
Anyway, I've no idea where they are now, and in any case much as I love to find these things, nowadays I tend to leave them in the book where they were found.
This is one such find from this summer's book purchases (of which more later) and one which I find very amusing, but can't put my finger on exactly why.
PS - What is also remarkable is that a nursery still exists at that address - usually they are long gone.