have been answered by the god that he should live so long as he sacrificed one of his sons every ninth year. He sacrificed nine of them in this manner, and would have sacrificed the tenth and last, but the Swedes would not allow him. So he died and was buried in a mound at Upsala. Another indication of a similar tenure of the crown occurs in a curious legend of the deposition and banishment of Odin. Offended at his misdeeds, the other gods outlawed and exiled him, but set up in his place a substitute, Oller by name, a cunning wizard, to whom they accorded the symbols both of royalty and of godhead. The deputy bore the name of Odin, and reigned for nearly ten years, when he was driven from the throne, while the real Odin came to his own again. His discomfited rival retired to Sweden and was afterwards slain in an attempt to repair his shattered fortunes. As gods are often merely men who loom large through the mists of tradition, we may conjecture that this Norse legend preserves a confused reminiscence of ancient Swedish kings who reigned for nine or ten years together, then abdicated, delegating to others the privilege of dying for their country. The great festival which was held at Upsala every nine years may have been the occasion on which the king or his deputy was put to death. We know that human sacrifices formed part of the rites.
There are some grounds for believing that the reign of many ancient Greek kings was limited to eight years, or at least that at the end of every period of eight years a new consecration, a fresh outpouring of the divine grace, was regarded as necessary in order to enable them to discharge their civil and religious duties. Thus it was a rule of the Spartan constitution that every eighth year the ephors should choose a clear and moonless night and sitting down observe the sky in silence. If during their vigil they saw a meteor or shooting star, they inferred that the king had sinned against the deity, and they suspended him from his functions until the Delphic or Olympic oracle should reinstate him in them. This custom, which has all the air of great antiquity, was not suffered to remain a dead letter even in the last period of the Spartan monarchy; for in the third century before our era a king, who had rendered himself obnoxious to the reforming party, was actually deposed on various trumped-up charges, among which the allegation that the ominous sign had been seen in the sky took a prominent place.
If the tenure of the regal office was formerly limited among the Spartans to eight years, we may naturally ask, why was that precise period selected as the measure of a king's reign? The reason is probably to be found in those astronomical considerations which determined the early Greek calendar. The difficulty of reconciling lunar with solar time is one of the standing puzzles which has taxed the ingenuity of men who are emerging from barbarism. Now an octennial cycle is the shortest period at the end of which sun and moon really mark time together after overlapping, so to say, throughout the whole of the interval. Thus, for example, it is only once in every eight years that the full moon coincides with the longest or
