Illustrated Companion to the Latin Dictionary/Tesserarius

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

TESSERA'RIUS. In the army, the orderly who received the billet (tesserae) containing the watchword or the order for action from the general, and who communicated it through the army. Tac. Hist. i. 25. Veg. Mil. ii. 7.