Trained from his youth to the exercise of arms, he was a most dexterous swordsman, very light on his feet, and at home in the saddle.
His speech was calm, nor did he ever use oaths or strong language, nor give away to exhibitions of temper though a mounting flush and the swelling veins of his forehead betrayed his mastered passion when he was vexed, while a characteristic gesture of annoyance or impatience was the casting aside of his cloak.
He dressed with exquisite care and great sobriety, eschewing any excess of ornament. One splendid jewel adorned his hand, a gold medal of the Blessed Virgin, with St. John on the reverse, hung from a finely wrought gold chain around his neck, and just under the feathers of his cap was also a gold medal; these were his only ornaments. He had some knowledge of Latin, and many of the psalms, hymns, and parts of the Church liturgy, which he knew by heart, he was fond of reciting.
Though careless of his food, he was a great eater, but moderate in drinking, and no one could better withstand privations than he, as was constantly shown on his long marches. His chief relaxation was games of chance, in which he indulged habitually, but dispassionately, making either his winnings or losses a subject for jokes and laughter. When strict laws were enacted suppressing gambling in Mexico, his enemies alleged that he himself violated the law, and that the tables and cards were always ready in his own house.
One of the most notable things in his last will is the mention of his doubts about the right of holding slaves. He admonishes his eldest son to look well into the question, and if it should be decided by competent opinion that the practice was wrong, he must act in accordance with strict justice; meanwhile he must give great attention to the welfare and education of his people. He left a foundation and endowment fund for the hospital of Jesus
