First Edition. Paul Wenck dustjacket art. Adventure novel set in Middle East among the Rif tribes. "Here these people are despisers of Christians and teachers of the Koran.... the unconquered of all the Riffian Tribes." Author was a famed Harvard race anthropologist. Near Fine with small gift inscription on title page in Very Good to Near Fine dustjacket with shallow chipping to spine ends and a short closed tear to top front panel. A very uncommon title, especially so in dustjacket.