E. M. Wherry & S. M. Zwemer 
Mohammedan World of to-Day [PDF ebook] 
Being Papers Read at the First Missionary Conference on Behalf of the Mohammedan World Held at Cairo, April 4th-9th, 1906

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Abu Bekr said This is the day of my release and obtaining of my desert; if gladness, it will be lasting; if sorrow, it will never cease.