This leads to an inference that the Second Treatise was written before 1300.
Attention is due also to a passage in the third chapter of the First Treatise (on pages 16 and 17 in this volume), in which Dante speaks of his long exile and poverty.

The exile and the wanderings of Dante began after the year 1300.

He was befriended by Guido da Polenta in Ravenna, by Uguccione della Faggiola in Lucca, by Malaspina in the Lunigiana, by Can Grande della Scala in Verona, by Bosone de' Raffaelli in Gubbio, by the Patriarch Pagano della Torre in Udine.

In 1311, when the Emperor Henry of Luxembourg went to Italy, Dante had some hope of return, which passed away in 1313 when that Emperor died in Buonconvento.

Dante remained in exile.