Reprint of the 1922-1925 ed. published in 2 v. by L. Friederichsen, Hamburg, which was issued as Bd. 10 & 16 of the Abhandlungen aus dem Gebiet der Auslandskunde, Hamburgische Universität, and as Bd. 6 & 9 of its subseries: Reihe B, Völkerkunde, Kultur und Sprachen.