Note 263 — Chapter V · WAR AGAINST THE BELGÆ. (Year of Rome 697.) (Book II. of the “Commentaries.”)
Reading edition
Signum dare, “to give the word of order.” In fact, we read in Suetonius: “Primo etiam imperii die signum excubanti tribuno dedit: Optimam matrem.” (Nero, 9; Caligula, 56.—Tacitus, Histor., III. 22.)