These failings, to which he was naturally addicted, increased under the tuition of Don Juan Alfonso de Albuquerque, the tutor given him by his father when a little child to train him in good habits. This may be suspected from the fact that, after he was king, this man was admitted to his intimacy, and in all things was given great authority, to the envy and discontent of the nobles, who declared that he endeavoured to increase his wealth at the expense of the public good--the worst possible of all plagues.[g] Thus the historian Mariana.[g] The figure of Pedro I stands in history and romance for that of a monster of cruelty, though it must be borne in mind that Pedro López de Ayala,[h] the chronicler who has left us an account of his reign, was the friend and supporter of his rebellious brother Henry of Trastamara. Pedro was the only son of Maria of Portugal, queen of Alfonso XI, but Alfonso’s mistress, Leonora de Guzman, had several sons of whom Henry (Enrique) was the eldest. His father had settled on him the great domain and title of Trastamara, and he is generally known as Henry of Trastamara.[a] [Sidenote: [1350-1352 A.D.]] On the accession of Pedro, Leonora de Guzman, dreading his resentment, or rather that of the queen-mother, retired to the city of Medina Sidonia, which formed her appanage. Through the perfidious persuasions, however, of a Lara and an Albuquerque, who governed the mind of Pedro, and who pledged their knightly faith that she had nothing to fear, she proceeded to Seville to do homage to the new sovereign. No sooner did she reach that city, than she was arrested and placed under a guard in the Alcazar. The eldest of her sons, who was permitted to visit her there, would have shared the same fate, had he not precipitately retreated from the capital. From Seville she was soon transferred to Carmona; and if her life was spared a few months, it was not owing to the forbearance, but to the indisposition of the king, which was at one time so dangerous as to render his recovery hopeless. Unfortunately for Spain, he did recover; and one of his first objects, early in 1351, was to draw her from Carmona, and make her accompany him to Talavera, where she was consigned to a still closer confinement. Her doom was soon sealed: in a few days she was put to death by the express order of the queen; no doubt, with the concurrence of the king.