[409] De Bello Gallico, V. 23.
[410] Strabo, p. 167.
[411] Pliny, Hist. Nat., IX., 116.—Solinus, LIII. 28.
[412] “I have received, on the 4th of the nones of June (the 1st of June, according to the concordance here adopted, see Appendix A), your letter dated from Placentia; that of the following day, dated from Lodi, arrived on the very day of the nones (4th of June).” It was accompanied with a letter from Cæsar, expressing his satisfaction at the arrival of Quintus. (Cicero, Epist. ad Quintum, II. 15.
[413] Cicero, Epist. ad Atticum, IV. 15. This letter was closed on the 5th of the calends of August, answering to the 26th of July.
[414] “I have received, on the day of the ides of September (the 9th of September), your fourth letter, dated from Britain on the 4th of the ides of August (8th of August).” (Epist. ad Quintum, III. 1.
[415] “The 11th of the calends of October (16th of September) your courier arrived; he has taken twenty days on the road; my uneasiness was mortal.” (Epist. ad Quintum, III. 1.)—“Cæsar has written to me from Britain a letter, dated on the calends of September (28th of August), which I received on the 4th of the calends of October. It appears that affairs are not going on ill with him. Cæsar adds, to prevent me from being surprised at not hearing from you, that you were not with him when he came to the coast (23rd of September).”
[416] Cicero, Epist. ad Quintum, III. 3.
[417] At ten miles to the east of Deal it is high tide half an hour later than at Dover, and the reflux begins there four hours after the hour of high tide.
[418] Those who refuse to admit Boulogne and Deal for the points of Cæsar’s embarking and landing, pretend that so long a time was not necessary to effect so short a passage. But a fleet requires a longer time to navigate the more numerous it is; resembling in that an army, which marches much more slowly than a single man.