Arthur Gilman 
Saracens, From the Earliest Times to the Fall of Bagdad [PDF ebook] 

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. After this name had been used in an indefinite manner for all the unknown tribes of the desert, it was given to the followers of Mohammed; and it is used in that sense in the following pages, thus com prising many different nations, scattered at times from the Atlantic to the Pacific.