[138] Caesar, B. G. II. 4.
[139] W. Ridgeway, “The Greek Trade Routes to Britain” (Folklore, March 1880, p. 23).
[140] Strabo, 199, leaves out tin here although he mentions it when quoting from Posidonius. The reason is that after the tin-mines of Northern Spain had been developed by Publius Crassus, Caesar’s lieutenant, the British tin trade ceased.
[141] Strabo, page 201.
[142] IV. 151.
[143] Herodotus, I. 163-4.
[144] Strabo, 147.
[145] Strabo, 146.
[146] Strabo, 146 sq.
[147] Diodorus, v. 35.