Note 220 — Chapter III
Reading edition
See Vict. Hist. of ... Hertford, i, 229, and Archaeol. Journal, lv, 1898, p. 285. Dr. A. H. Keane’s extravagant estimates of the length of the Neolithic Age in Europe, which vary between the limits of ‘scarcely less than 60,000 years’ (Ethnology, 2nd ed., 1896, p. 55) and ‘over 100,000 years’ (ib., p. 116), are based upon obsolete calculations of the chronology of the Glacial Period. See pp. 31-2, supra.