Among the manuscripts for which I am indebted to the liberality of that illustrious Spanish scholar, the lamented Navarrete, the most remarkable, in connection with this history, is the work of Pedro Pizarro; Relaciones del Descubrimiento y Conquista de los Reynos del Peru. But a single copy of this important document appears to have been preserved, the existence of which was but little known till it came into the hands of Senior de Navarrete; though it did not escape the indefatigable researches of Herrera, as is evident from the mention of several incidents, some of them having personal relation to Pedro Pizarro himself, which the historian of the Indies could have derived through no other channel. The manuscript has lately been given to the public as part of the inestimable collection of historical documents now in process of publication at Madrid, under auspices which, we may trust, will insure its success. As the printed work did not reach me till my present labors were far advanced, I have preferred to rely on the manuscript copy for the brief remainder of my narrative, as I had been compelled to do for the previous portion of it. Nothing, that I am aware of, is known respecting the author, but what is to be gleaned from incidental notices of himself in his own history. He was born at Toledo in Estremadura, the fruitful province of adventurers to the New World, whence the family of Francis Pizarro, to which Pedro was allied, also emigrated. When that chief came over to undertake the conquest of Peru, after receiving his commission from the emperor in 1529, Pedro Pizarro, then only fifteen years of age, accompanied him in quality of page. For three years he remained attached to the house hold of his commander, and afterwards continued to follow his banner as a soldier of fortune. He was present at most of the memorable events of the Conquest, and seems to have possessed in a great degree the confidence of his leader, who employed him on some difficult missions, in which he displayed coolness and gallantry. It is true, we must take the author's own word for all this. But he tells his exploits with an air of honesty, and without any extraordinary effort to set them off in undue relief. He speaks of himself in the third person, and, as his manuscript was not intended solely for posterity, he would hardly have ventured on great misrepresentation, where fraud could so easily have been exposed.