Like Egypt, India is a land of ancient memories, but its history, or rather pre-history, does not begin until about a thousand years after the erection was completed of the great pyramids at Gizeh. Between 2000 B.C. and 1200 B.C. tribes of pastoral and patriarchal peoples of Aryan speech were pouring over the north-western frontier and settling in the Punjab. There are no written or inscribed records, or even native traditions, of this historic migration, but we are able to follow vaguely, from the references found in religious compositions, the gradual conquest of northern India, which covered a period of several centuries. To what extent this invasion was racial, rather than cultural, it is extremely difficult to discover. But no doubt can be entertained regarding the influence exercised by the ancient military aristocracy and their religious teachers. Certain of the Aryan gods still receive recognition in India after a lapse of over three thousand years. This fact makes Indian mythology of special interest to the ever-increasing number of students of comparative religion. Indian mythology also possesses particular attractions for us on account of its intimate association with what is known as the “Aryan problem”. Scholars of a past generation held pronounced views on Aryan matters, and produced a considerable literature of highly controversial character. In fact, theories regarding the Aryan languages and the Aryan “race” are as varied as they are numerous; the wordy warfare which occupied the greater part of the nineteenth century, was waged ever strenuously and not infrequently with much brilliance; occasionally, however, it was not awanting in the undesirable elements of personal feeling and national antipathy. But, happily, we appear to have reached a time when this fascinating and important problem can be considered dispassionately in the proper scientific spirit, and without experiencing that unnecessary dread of having to abandon decided opinions which may have been formed when the accumulated data had less variety and bulk than that which is now available. This change has been brought about by the extended study of comparative religion and the wonderful and engaging results which have attended modern-day methods of ethnic and archæological research.