The Caliphate, if it existed at all, was in the modern world a less imposing name than the Sultanate; and the two had since the destruction of Bagdad become confused, as they still remain, in men's minds who do not any more now make common use of the older title. Thus it was not difficult for the new Sultan of Damascus and Cairo and Medina to impose himself on the multitude--not merely as heir to the Caliphal possessions, but to the title also of the Caliphs and their spiritual rank. Advantage, too, seems to have been taken in the first instance, as it has been subsequently, of the accidental resemblance of name between Othman, Selim's ancestor, and Othman the third Caliph. The vulgar ear caught the sound as one familiar to it, and was satisfied, for there is all the world in a name. With the Ulema, however, it was necessary to be more precise; and we know that the question of the Ottoman right to the spiritual succession of the Prophet was one long and hotly debated in the schools. Tradition was formal on the point of excluding aliens to the Koreysh from this its legal inheritance, for Mohammed himself had repeatedly distinguished his own tribe as being the sole heirs to his authority; nor would any doctor of the specially Arabian schools listen to a departure from ideas so absolute. The Hanefite school, however, representing those chiefly interested in accepting the Ottoman pretension, undertook its legal defence, and succeeded, in spite of the one great obstacle of birth, in making out a very tolerable case for themselves and the Beni Othman--a case which, in the absence of any rival candidate to oppose to them, has since been tacitly accepted by the majority of the Sunite Ulema. The difficulty, however, was in practice settled by a compromise, and the dispute itself had long been forgotten by all but the learned, until within the present generation its arguments were once more dragged out publicly to serve a political purpose. The Hanefite arguments are on this account interesting, and I have been at pains to ascertain and understand them; but perhaps before I state them in detail it will be best first briefly to run over the Caliphal history of an earlier age and describe the state of things which Selim's act superseded. Orthodox Mussulman writers recognize four distinct phases which the office of Khalifeh has undergone, and four distinct periods of its history. The word Khalifeh, derived from the Arabic root _khalafa_, to "leave behind," signifies literally one left behind, and in the legal sense the relict or successor of the prophet and heir to his temporal and spiritual power.