See p. 37.
Caesar, 'Bell. Gall.' iii. 9, 13.
Elton, 'Origins of English Hist.,' p. 237. Though less massive, these vessels are built much as the Venetian. But it is just as probable they may really be "picts." See p. 232.
This opening of Britain to continental influences may perhaps account for Posidonius having been able to make so thorough a survey of the islands. See p. 36.