When I put forward the suggestion that the annual inundation of the Nile provided the information for the first measurement of the year, I was not aware of the fact that Sir Norman Lockyer ("The Dawn of Astronomy," 1894, p. 209), had already made the same claim and substantiated it by much fuller evidence than I have brought together here.
In preparing these lectures I have received help from so large a number of correspondents that it is difficult to enumerate all of them. But I am under a special debt of gratitude to Dr. Alan Gardiner for calling my attention to the fact that the common rendering of the Egyptian word didi as "mandrake" was unjustifiable, and to Mr. F. Ll. Griffith for explaining its true meaning and for lending me the literature relating to this matter. Miss Winifred M. Crompton, the Assistant Keeper of the Egyptian Department in the Manchester Museum, gave me very material assistance by bringing to my attention some very important literature which otherwise would have been overlooked; and both she and Miss Dorothy Davison helped me with the drawings that illustrate this volume. Mr. Wilfrid Jackson gave me much of the information concerning shells and cephalopods which forms such an essential part of the argument, and he also collected a good deal of the literature which I have made use of. Dr. A. C. Haddon, F.R.S., of Cambridge, lent me a number of books and journals which I was unable to obtain in Manchester; and Mr. Donald A. Mackenzie, of Edinburgh, has poured in upon me a stream of information, especially upon the folk-lore of Scotland and India. Nor must I forget to acknowledge the invaluable help and forbearance of Mr. Henry Guppy, of the John Rylands Library, and Mr. Charles W. E. Leigh, of the University Library. To all of these and to the still larger number of correspondents who have helped me I offer my most grateful thanks.
During the three years in which these lectures were compiled I have been associated with Dr. W. H. R. Rivers, F.R.S., and Mr. T. H. Pear in their psychological work in the military hospitals, and the influence of this interesting experience is manifest upon every page of this volume.
But perhaps the most potent factor of all in shaping my views and directing my train of thought has been the stimulating influence of Mr. W. J. Perry's researches, which are converting ethnology into a real science and shedding a brilliant light upon the early history of civilization.
G. ELLIOT SMITH.
9 December, 1918.
[1] "The Influence of Ancient Egyptian Civilisation in the East and in America," Bulletin of the John Rylands Library, January-March, 1916.
[2] Nathan Söderblom, "Les Fravashis Étude sur les Traces dans le Mazdéisme d'une Ancienne Conception sur la Survivance des Morts," Paris, 1899.