Clearly these conclusions do not of themselves suffice to explain the peculiar rule of succession to the priesthood. But perhaps the survey of a wider field may lead us to think that they contain in germ the solution of the problem. To that wider survey we must now address ourselves. It will be long and laborious, but may possess something of the interest and charm of a voyage of discovery, in which we shall visit many strange foreign lands, with strange foreign peoples, and still stranger customs. The wind is in the shrouds: we shake out our sails to it, and leave the coast of Italy behind us for a time. II. Priestly Kings THE questions which we have set ourselves to answer are mainly two: first, why had Diana's priest at Nemi, the King of the Wood, to slay his predecessor? second, why before doing so had he to pluck the branch of a certain tree which the public opinion of the ancients identified with Virgil's Golden Bough? The first point on which we fasten is the priest's title. Why was he called the King of the Wood? Why was his office spoken of as a kingdom? The union of a royal title with priestly duties was common in ancient Italy and Greece. At Rome and in other cities of Latium there was a priest called the Sacrificial King or King of the Sacred Rites, and his wife bore the title of Queen of the Sacred Rites. In republican Athens the second annual magistrate of the state was called the King, and his wife the Queen; the functions of both were religious. Many other Greek democracies had titular kings, whose duties, so far as they are known, seem to have been priestly, and to have centered round the Common Hearth of the state. Some Greek states had several of these titular kings, who held office simultaneously. At Rome the tradition was that the Sacrificial King had been appointed after the abolition of the monarchy in order to offer the sacrifices which before had been offered by the kings. A similar view as to the origin of the priestly kings appears to have prevailed in Greece. In itself the opinion is not improbable, and it is borne out by the example of Sparta, almost the only purely Greek state which retained the kingly form of government in historical times. For in Sparta all state sacrifices were offered by the kings as descendants of the god. One of the two Spartan kings held the priesthood of Zeus Lacedaemon, the other the priesthood of Heavenly Zeus.