These lectures, delivered in 1913 in the University of London, highlight several items of important contrast between the early days of Christianity and the early days of Islam. The Early Development of Mohammedanism contains the following eight lectures: • The Koran as the Basis of Islam • The Same Continued • The Legal Supplement • The Status of the Tolerated Cults • The Development of Mohammedan Ethics • Asceticism Leading to Pantheism • The Philosophical Supplement • The Historical Supplement