R.M. Boehmer & H.G. Güterbock, Glyptik aus dem Stadgebiet von Bogûazko¬y, Berlin (1987)

This drawing shows a 13th-century B.C. Hittite hieroglyphic seal that belonged to a scribe, whose scribal sign is depicted twice (far left and above the figure’s left hand). The sign does not distinguish between a scribe-on-wood and a scribe-on-clay; hence it may represent a two-leaved writing board opened flat or possibly a two-columned clay tablet.