Alfred W. Pollard,
Old Picture Books, With Other Essays on Bookish Subjects
“ For fear of any possible mistake, I should perhaps emphasise the point that the collection must be one not of printers' marks cut out from books, but of books in which the marks are printed. Even in the case of book-plates, it has often been noted how much they gain in interest when they are found in situ, though there is always the haunting fear that the conjunction of book and plate may only be due to the ingenuity of the vendor. ”
