The silence of the Sicilian historians, who end too soon, or begin too late, must be supplied by Otho of Frisingen, a German, (de Gestis Frederici I. l. i. c. 33, in Muratori, Script. tom. vi. p. 668,) the Venetian Andrew Dandulus, (Id. tom. xii. p. 282, 283) and the Greek writers Cinnamus (l. iii. c. 2 - 5) and Nicetas, (in Manuel. l. iii. c. 1 - 6.)