William Muir,
The Caliphate: Its Rise, Decline and Fall…
“ The closer study of The Caliphate as well as of the Life leaves one with a strong impression of the Author's extreme accuracy in reproducing the statements of his authorities, as well as of the soundness of his judgment in weighing the evidence in support of two or more divergent accounts.The Caliphate is based, as far as the Eastern side of the history goes, upon the Annals of Ibn al-Athir, who lived and wrote at Mosul in the early part of the thirteenth century A.D. Sir William Muir read the work through and added a summary translation on the margin of his copy. ”
