5. C.Decimius, a person wno had held the office of quaestor (quaestorius), and belonged to the party of Pompey. In B. C. 47 he was in the island of Cercina to take care of the provisions for the Pompeians, but on the arrival of Sallust, the historian, who was then a general of Caesar, Decimius immediately quitted the island, and fled in a small vessel. (Caes. Bell. Afr. 34.) He seems to be the same as the C. Decimius who was a friend of Atticus. (Cic. Att. 4.16.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890