Leaf of a Writing Tablet – French – The Metropolitan Museum of Art https://www.metmuseum.org/art/collection/search/467643
On the back of this rectangular ivory panel, a raised rim surrounds a smooth, recessed compartment, displaying the vertical orientation of the ivory grain. The recessed field provided an area for the panel to receive a thin sheet of wax that could be used as an erasable writing surface
Les Arts 9, no. 100 (April 1910). p. 5.
