
e  first  edition  of  this  book  having  been  out  of  print  for  several  years  and
frequent  inquiries  having  been  made  for  copies,  this  new  edition  has  been
prepared and an effort has been made to revise the work in the light of the fresh
materials tha
t have accumulated during the last sixteen years; but I can make no
claim  to  have  made  myself  acquainted  with  the  whole  of  the  vast  literature  on
the  subject,  in  upwards  of  ten  different  languages,  which  has  been  published
during  this  interval.  The  growing
interest  in  Islam  and  the  various  branches  of
study  connected  with  it,  may  be  estimated  from  the  fact  that  since  1906  five
periodicals have made their appearance devoted to investi
gations cognate to the
subject
-
matter  of  the  present  work,  viz.
Revue  du  M
onde  Musulman,  publié
e
par La Mission Scientifique du Maroc (
Paris, 1906
-
); Der Islam, Zeitschrift fü
r
Geschichte  und  Kultur  des  islamischen  Orients  (Strassburg,  1910
-
)
;  The
Moslem  World,  a  quarterly  review  of  current  events,  literature,  and  thought
amon
g Mohammedans, and the progress of Christian Missions in Moslem lands
(London, 1911
-
); Mir Islama (St. Petersburg, 1912
-
); and Die Welt des Islams,
Zeitschrift  der  deutschen  Gesellschaft  f
ü
r  Islamkunde  (Berlin,  1913
—
).  The
Christian  missionary  societies
are  also  now  devoting  increased  attention  to  the
subject   of   Muslim   missionary   activity   and   accordingly   it&n