[2868] Essai ... sur l’arrondissement communal de Boulogne-sur-mer, p. 130.

[2869] Bull. de la Soc. acad. de ... Boulogne-sur-mer, i, 1873, pp. 132-3.

[2870] I mean, of course, on any part of the coast which can be regarded as lying within the limits required by Caesar’s narrative. The estuary of the Authie is about 11 miles further south than that of the Canche; and the estuary of the Somme is, as we have seen (pp. 558-63, supra) inadmissible.

[2871] Géogr. de la Gaule rom., i, 376-80, and pl. xv. See also T. Lewin, The Invasion of Britain, &c., 1862, pp. c-ci, and Boulogne-sur-mer et la région boulonnaise, i, 1899, p. 708. ‘Au xive siècle,’ says M. Lejeal (ib., p. 369), ‘la mer pénétrait encore jusqu’à Isques.’

[2872] D. Haigneré, Recueil hist. du Boulonnais, ii, 416, 420-4.

[2873] Essai ... sur l’arrondissement communal de Boulogne-sur-mer, p. 63.

[2874] See a map in the British Museum, called Plan général du port de Boulogne, avec les dispositions proposées ... pour sortir du port dans une marée 300 batimens portant une armée de 60,000 hommes, 1822. This from the small modern port.

[2875] Archaeologia, xxxiv, 1852, p. 236.

[2876] E. Reclus, Nouv. Géogr. Univ.,—La France, 1877, p. 792.

[2877] For the second expedition the vessels were specially constructed of light draught (B. G., v, 1, § 2); and those which Napoleon built for the flotilla of 1804 did not draw more than 3 feet of water (Nap. III, Hist. de Jules César, ii, 172). Even in Caesar’s first expedition the draught of the transports could not have been great, as the men were able to jump off them into the sea and wade ashore.