Nicephorus Gregoras has expatiated with pleasure on this amiable character (l. xii. 7, xiii. 4, 10, xiv. 1, 9, xvi. 6). Cantacuzene speaks with honor and esteem of his ally (l. iii. c. 56, 57, 63, 64, 66, 67, 68, 86, 89, 95, 96); but he seems ignorant of his own sentimental passion for the Turks, and indirectly denies the possibility of such unnatural friendship (l. iv. c. 40).