maps showing the connection of the British river system with that of the Continent, see Boyd Dawkins, Early Man in Britain, London, 1880, pp. 18, 41, 73; also Lyell, Antiquity of Man, chap. xiv. As to the long continuance of the early Stone period, see James Geikie, The Great Ice Age, New York, 1888, p. 402. As to the impossibility of the animals of the arctic and torrid regions living together or visiting the same place at different times in the same year, see Geikie, as above, pp. 421 et seq.; and for a conclusive argument that the animals of the period assigned lived in England not since, but before, the Glacial period, or in the intergalcial period, see ibid., p. 459. For a very candid statement by perhaps the foremost leader of the theological rear-guard, admitting the insuperable difficulties presented by the Old Testament chronology as regards the Creation and the Deluge, see the Duke of Argyll's Primeval Man, pp. 90-100, and especially pp. 93, 124. For a succinct statement on the general subject, see Laing, Problems of the Future, London, 1889, chapters v and vi. For discoveries of prehistoric implements in India, see notes by Bruce Foote, F. G. S., in the British Journal of the Anthropological Institute for 1886 and 1887. For similar discoveries in South Africa, see Gooch, in Journal of the Anthropological Institute of Great Britain and Ireland, vol. xi, pp. 124 et seq. For proofs of the existance of Palaeolithic man in Egypt, see Mook, Haynes, Pitt-Rivers, Flinders-Petrie, and others, cited at length in the next chapter. For the corroborative and concurrent testimony of ethnology, philology, and history to the vast antiquity of man, see Tylor, Anthropology, chap. i. As an important supplement to these discoveries of ancient implements came sundry comparisons made by eminent physiologists between human