Note 2387 — THE CASSITERIDES, ICTIS, AND THE BRITISH TRADE IN TIN

As Professor Ridgeway assumes that Posidonius was the authority whom Diodorus followed both in v, 22 and in v, 38, he would be compelled to maintain that in the passage which served as the basis of the former chapter Posidonius was describing only the route which the tin trade followed in the time of Pytheas, in the other that which it followed in his own time. How can the professor prove this?