Whether he was present at their futile assault on Florence (July 22, 1304) is doubtful, but probably he was not. From the Ottimo Comento, written at least in part
See Witte, Quando e da chi sia composto la Ottimo Comento, etc. (Leipsic, 1847). by a contemporary as early as 1333, we learn that Dante soon separated himself from his companions in misfortune with mutual discontents and recriminations.
Ott. Corn. Parad. XVII. During the nineteen years of Dante's exile, it would some of the poems are of even earlier date), and the book is commonly assumed to have been finished by 1295; Foscolo says 1294.
But Professor Karl Witte, a high authority, extends the term as far as 1300.
Dante Alighieri's lyrische Gedichte, Leipzig, 1842, Theil II. pp. 4-9. The title of the book also, Vita Nuova, has been diversely interpreted.
Mr. Garrow, who published an English version of it at Florence in 1846, entitles it the Early Life of Dante.
Balbo understands it in the same way