If he knows where to look for them, the traveller may find among the suburbs of London two Mohammedan mosques — one about thirty-six years old at Woking in Surrey, the other only a year or two old at Southfields near Wandsworth. Here, every week, come English worshippers, and from these centres of Islam, with their resident missionaries, go forth various types of propaganda aiming to present Islam in favorable and convincing fashion to the modern western world. Both of these headquarters are controlled by branches or sub-sects of the Ahmadiya Movement — a recent heretical offshoot of Mohammedanism. The study of its origin and present teachings, therefore, has more than academic value, for it will reveal the history and aims of the only branch of Islam which is seriously trying to convert western Christians.