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. Differences in the dates of events are not unfrequent, occur ring chiefly in translations of Muhammadan histories, - arising partly perhaps from inattention in computing the European from the Hijra reckoning - but also from other sources, - and it is difficult to rectify such differences when they amount to a year or more. When careful research is applied to such matters, cases of the kind will in course of time be cleared up; and though none of them are of great importance, they may be corrected when a second edition of this handbook is required.