from the beginning of the world to the death of Alexius Comnenus. The first volume of it is an abstract from Josephus, the second from Dio, and the third from several, particularly from Cedrenus, Skylitzes, and others; as to the later books of Dio, he could not procure them in spite of all his inquiries. He was imperial secretary, and commander of the body-guard. Nor was he a fool, though his judgment is exceedingly narrow; but his extracts from Dio, whom he does not mention as his authority, are of the highest importance. He was formerly overlooked, and I was the first to direct attention to him. Freinsheim made use of him where Livy is wanting, but no further. The excerpta _de Sententiis_ especially, show with what accuracy he selected from Dio. Dio has been edited by Stephens at Basle, and by H. S. Reimarus. A collation of the Venetian manuscript would be infinitely important. The annotations of Fabricius and Reimarus are of extraordinary value in an historical point of view. What is defective in Fabricius, as well as in his son-in-law Reimarus, is grammatical knowledge. Yet this deficiency has not prevented Reimarus from directing the whole of his attention to the index, which is excellent. If he had made the index before the edition was completed, he would have arranged quite differently the strictly philological part of his work. Philological indices are a most useful aid in study, and infinitely heighten the value of an edition. The task of compiling them leads to a great number of questions and inquiries, which otherwise would never have been thought of.[29]