After having enjoyed the office of secretary to the royal council of Castille for fifteen years, the king was graciously pleased to order me to Peru in 1543, as treasurer-general of that province and of the Tierra Firma; in which employment I was entrusted with the entire receipt of the royal revenues and rights, and the payment of all his majesties officers in those countries. I sailed thither in the fleet which conveyed Blasco Nugnez Vela the viceroy of Peru; and immediately on my arrival in the New World, I observed so many insurrections, disputes, and novelties, that I felt much inclined to transmit their memory to posterity. I accordingly wrote down every transaction as it occurred; but soon discovered that these could not be understood unless the previous events were explained from which they originated. I found it necessary, therefore, to go back to the epoch of the discovery of the country, to give a detail of the occurrences in their just order and connection. My work might perhaps have been somewhat more perfect, if I had been able to compose it in regular order while in Peru; but a brutal major-general, who had served under Gonzalo Pizarro106, threatened to put any one to death who should presume to write a history of his transactions, so that I was obliged to satisfy myself with collecting all the documents I could procure for enabling me to compose my history after returning into Spain. He was perhaps right in wishing these transactions might fall into oblivion, instead of being transmitted to posterity.

Should my style of writing be found not to possess all the polish that my readers may desire, it will at least record the true state of events; and I shall not be disappointed if it only serve to enable another to present a history of the same period in more elegant language and more orderly arrangement. I have principally directed my attention to a strict regard for truth, the soul of history, using neither art nor disguise in my description of things and events which I have seen and known; and in relating those matters which happened before my arrival, I have trusted to the information of dispassionate persons, worthy of credit. These were not easy to find in Peru, most persons having received either benefits or injuries from the party of Pizarro or that of Almagro; which were as violent in their mutual resentments as the adherents of Marius and Sylla, or of Caesar and Pompey of old.

In all histories there are three chief requisites: the designs, the actions, and the consequences. In the two latter particulars I have used all possible care to be accurate. If I may not always agree with other authors in regard to the first of these circumstances, I can only say that such is often the case with the most accurate and faithful historians. After I had finished this work, it was my intention to have kept it long unpublished, lest I might offend the families of those persons whose improper conduct is therein pourtrayed. But some persons to whom I had communicated my manuscript, shewed it to the king during his voyage to England, who had it read to him as an amusement from the tiresomeness of the voyage. My work had the good fortune to please his majesty, who honoured it with his approbation, and graciously commanded me to have it printed; and which I have the more readily complied with, as his royal commands may protect my book from the cavils of the censorious readers.

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Much difficulty occurs respecting the origin of the people who inhabited Peru and the other provinces of America, and by what means their ancestors could have crossed the vast extent of sea which separates that country from the old world. In my opinion this may be explained from what is said by Plato in his Timaeus, and the subsequent dialogue entitled Atlantis. He says: "That the Egyptians report, to the honour of the Athenians, that they contributed to defeat certain kings who came with a numerous army by sea from the great island of Atlantis, which, beginning beyond the Pillars of Hercules, is larger than all Asia and Africa together, and is divided into ten kingdoms which Neptune gave among his ten sons, Atlas, the eldest, having the largest and most valuable share." Plato adds several remarkable particulars concerning the customs and riches of that island; especially concerning a magnificent temple in the chief city, the walls of which were entirely covered over with gold and silver, having a roof of copper, and many other circumstances which are here omitted for the sake of brevity; though it is certain that several customs and ceremonies mentioned by Plato are still practised in the provinces of Peru. Beyond the great island of Atlantis, there were other large islands not far distant from the Firm Land, beyond which again was the True Sea. The following are the words which Plato attributes, in his Timaeus, to Socrates, as spoken to the Athenians. "It is held certain, that in ancient times your city resisted an immense number of enemies from the Atlantic Ocean, who had conquered almost all Europe and Asia. In those days the Straits were navigable, and immediately beyond them there was an island, commencing almost at the Pillars of Hercules, which was said to be larger than Asia and Africa united; from whence the passage was easy to other islands near and opposite to the continent of the True Sea." A little after this passage, it is added. "That nine thousand years before his days, a great change took place, as the sea adjoining that island was so increased by the accession of a prodigious quantity of water, that in the course of one day it swallowed up the whole island; since when that sea has remained so full of shallows and sand banks as to be no longer navigable, neither has any one been able to reach the other islands and the Firm Land."

Some authors hare believed this recital to be merely allegorical, while most of the commentators on Plato considered it as a real historical narrative. The nine thousand years, mentioned by Plato, must not be considered as an indication of this discourse being fabulous; since, according to Eudoxus, we must understand them as lunar years or moons, after the Egyptian mode of computation, or nine thousand months, which are seven hundred and fifty years. All historians and cosmographers, ancient as well as modern, have concurred to name the sea by which that great island was swallowed up, the Atlantic Ocean, in which the name of that ancient island is retained, giving a strong evidence of its former existence. Adopting, therefore the truth of this historical fact, it must be granted that this island of Atlantis, beginning from the Straits of Gibraltar near Cadiz, must have stretched a vast way from north to south, and from east to west, since it was larger than all Asia and Africa. The other islands in the neighbourhood must have been those now named Hispaniola, Cuba, Porto Rico, Jamaica, and others of the West Indies; and the Firm Land, that part of the Continent to which we still give the name of Tierra Firma, together with the other countries and provinces of America, from the Straits of Magellan in the south to the extreme north; as Peru, Popayan, Golden Castille, Veragua, Nicaragua, Guatimala, New Spain, the Seven Cities, Florida, Baccalaos, and so on along the north to Norway. The authority of Plato is conclusive that the New World which has been discovered in our time, is the same Continent or Firm Land mentioned by that philosopher; and his True Sea must be that which we name the South Sea, or Pacific Ocean; for the whole Mediterranean, and all that was before known of the Ocean, which we call the North Sea, can only be considered as rivers or lakes in comparison with the vast extent of that other sea. After these explanations, it is not difficult to conceive how mankind in ancient times may have passed from the great island of Atlantis and the other neighbouring isles, to what we now call the Tierra Firma, or Firm Land, and thence by land, or by the South Sea, into Peru: As we must believe that the inhabitants of these islands practised navigation, which they must have learned by intercourse with the great island, in which Plato expressly says there were many ships, and carefully constructed harbours. These, in my opinion, are the most probable conjectures which can be formed on this obscure subject of antiquity; more especially as we can derive no lights from the Peruvians, who have no writing by which to preserve the memory of ancient times. In New Spain, indeed, they had certain pictures, which answered in some measure instead of books and writings; but in Peru, they only used certain strings of different colours with several knots, by means of which and the distances between them, they were able to express some things in a very confused and uncertain manner, as shall be explained in the course of this history.