4. L.CalpurniusBibulus, the youngest son of No. 1, was quite a youth at his father's death (Plut. Brut. 13), after which he lived at Rome with M. Brutus, who married his mother Porcia. He went to Athens in B. C. 45 to prosecute his studies (Cic. Att. 12.32), and appears to have joined his step-father Brutus after the death of Caesar in 44, in consequence of which he was proscribed by the triumvirs. He was present at the battle of Philippi in 42, and shortly after surrendered himself to Antony, who pardoned him and promoted him to the command of his fleet, whence we find on some of the coins of Antony the inscription L. BIBULUS PRAEF. CLAS. (Eckhel, v. p. 161, vi. p. 57.) He was frequently employed by Antony in the negotiations between himself and Augustus, and was finally promoted by the former to the government of Syria, where he died shortly before the battle of Actium. (Appian, App. BC 4.38, 104,136, 5.132.) Bibulus wrote the Memorabilia of his step-father, a small work which Plutarch made use of in writing the life of Brutus. (Plut. Brut. 13, 23.)