Considerable obscurity is thrown over the latter years of his life. That is, no sufficient pains has been taken to throw light upon them. His manuscript works would, doubtless, if consulted, tell us more about him than is at present known. He devoted a portion of the decline of his life to study and literature; but it would seem that on his return from Italy, he did not immediately retire from active life, as it is mentioned by some of his biographers that he continued member of the council of state under Philip II. and was present at the battle of St. Quentin, fought in 1557. One of the last adventures recorded of him is characteristic of the vehemence of his temper. While at court, he had a quarrel with a noble who was his rival in the affections of a lady. His antagonist, in a fit of exasperation, unsheathed a dagger; but before he could use it, Mendoza seized him and threw him from the balcony where they were standing, into the street below. In all countries in those days, a personal assault within the precincts of a royal court was looked upon as a very serious offence, and Spanish etiquette caused it to be regarded in a still more heinous light. Still Mendoza was not the aggressor: and his punishment was limited to a short imprisonment, where he amused himself by addressing the lady of his love in various redondillas. Much of the latter part of his life was spent in retirement in his native city of Granada, given up to study and literature. He here composed the most esteemed of his prose works--the "History of the War of the Moriscos in Granada." The style of this work is exceedingly pure. He took the Latin authors Sallust and Cæsar for his models; and being an eye-witness of the events he records, his narrative is highly interesting. While in Italy, he had written a state paper, addressed to the emperor, dissuading him from selling the duchy of Milan to the pope, which was conceived in so free a style, that Sandoval, in quoting it in his history, believed it necessary to soften its expressions. In the same way this acute observer perceived the faults of the Spanish government against the Moriscos, and alluded to, although he did not dare blame them.