ITIUS PORTUS, the name given by Caesar to the chief harbour which he used when embarking for his second expedition to Britain in 54 B.c. It was certainly near Cape Grisnez (Proinun torium Itium), but the exact site has been disputed. Many have assumed that Caesar used the port for his first expedition, but the name does not appear at all in that connection and it is gen erally agreed that he first embarked at Boulogne, and the same view was widely held about the second. But T. Rice Holmes in
the Classical Review (May 1909) gave strong reasons for prefer ring Wissant, 4 m. E. of Grisnez.