The story, which I have called the Book of the Rolls, from an expression in its opening rubric, is taken from the Arabic MS. No. 508 in the Library of the Convent of Saint Catherine on Mount Sinai, where I photographed it during my second visit, in 1893, and where I revised it and re-photographed various pages on my two subsequent visits in 1895 and 1897. The work of copying it for the press, and of correcting the proof-sheets, I have done from my photographs at home. At first I thought it was a recension of the Book of Adam and Eve, of which an Arabic MS. exists in the Library at Munich, and which has been translated from the Ethiopic by the Rev. S. C. Malan, D.D., but in this I was mistaken.