Belgic chariot harasses Caesar's expedition to Britain by Angus McBride

"The Deified Caesar crossed over to the island twice, although he came back in haste, without accomplishing anything great or proceeding far into the island, not only on account of the quarrels that took place in the land of the Celti, among the barbarians and his own soldiers as well, but also on account of the fact that many of his ships had been lost at the time of the full moon, since the ebb-tides and the flood-tides got their increase at that time."

-Strabo, Geography, Book 4 Chapter 5

Source:

https://thelosttreasurechest.files.wordpress.com/2011/07/scan0098.jpg?w=1272

Quote:

https://penelope.uchicago.edu/Thayer/e/roman/texts/strabo/4e*.html