Mr. Anson, before he set sail upon this expedition, besides the printed journals to those parts, took care to furnish himself with the best manuscript accounts he could procure of all the Spanish settlements upon the coasts of Chili, Peru, and Mexico: these he carefully compared with the examinations of his prisoners, and the informations of several intelligent persons who fell into his hands in the South Seas. He had likewise the good fortune, in some of his captures, to possess himself of a great number of letters and papers of a public nature, many of them written by the Viceroy of Peru to the Viceroy of Santa Fee, to the Presidents of Panama and Chili, to Don Blass de Lezo, admiral of the galeons, and to divers other persons in considerable employments; and in these letters there was usually inserted a recital of those they were intended to answer; so that they contained no small part of the correspondence between those officers for some time previous to our arrival on that coast. We took, besides, many letters sent from persons entrusted by the Spanish Government to their friends and correspondents, which were frequently filled with narrations of public business, and sometimes contained undisguised animadversions on the views and conduct of their superiors. From these materials those accounts of the Spanish affairs are drawn which may at first sight appear the most exceptionable. In particular, the history of the various casualties which befel Pizarro's squadron is for the most part composed from intercepted letters. Though indeed the relation of the insurrection of Orellana and his followers is founded on rather a less disputable authority: for it was taken from the mouth of an English gentleman then on board Pizarro, who often conversed with Orellana; and it was upon inquiry confirmed in its principal circumstances by others who were in the ship at the same time: so that the fact, however extraordinary, is, I conceive, not to be contested. And on this occasion I cannot but mention, that though I have endeavoured with my utmost care to adhere strictly to truth in every article of the ensuing narration, yet I am {6} apprehensive that in so complicated a work some oversights must have been committed by the inattention to which at times all mankind are liable. However, I am as yet conscious of none but literal and insignificant mistakes; and if there are others more considerable which have escaped me, I flatter myself they are not of moment enough to affect any material transaction, and therefore I hope they may justly claim the reader's indulgence.