A representation of rolls arranged on the system which I have attempted to describe, occurs on a piece of sculpture found at Neumagen near Trèves in the seventeenth century, among the ruins of a fortified camp attributed to Constantine the Great. Two divisions, full of rolls, are shewn,from which a man, presumably the librarian, is selecting one. The ends of the rolls are furnished with tickets.
From THE CARE OF BOOKS An Essay on the Development of Libraries and their Fittings, from the earliest times to the end of the Eighteenth Century By John Willis Clark, M.A., F.S.A. Cambridge. 1901