he dragon story it came to play so prominent a part as to convince most writers that the myth was primarily and essentially astronomical. But it is clear that originally the myth was concerned solely with the regulation of irrigation systems and the search upon earth for an elixir of life.
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