Besides these descriptions and directions relating thereto, there is inserted in the ensuing work an ample account of a particular navigation of which hitherto little more than the name has been known, except to those immediately employed in it: I mean the track described by the Manila ship, in her passage to Acapulco, through the northern part of the Pacific Ocean. This material article is collected from the draughts and journals met with on board the Manila galeon, founded on the experience of more than a hundred and fifty years' practice, and corroborated in its principal circumstances by the concurrent evidence of all the Spanish prisoners taken in that vessel. And as many of their journals, which I have examined, appear to have been not ill kept, I presume the particulars of their route may be very safely relied on by future navigators. The advantages which may be drawn from an exact knowledge of this navigation, and the beneficial projects that may be formed thereon, both in war and peace, are by no means proper to be discussed in this place, but they will easily offer themselves to the skillful in maritime affairs. However, as the Manila ships are the only ones which have ever traversed this vast ocean, except a French straggler or two which have been afterwards seized on the coast of Mexico, and as, during near two ages in which this trade has been carried on, the Spaniards have, with the greatest care, secreted all accounts of their voyages from the rest of the world, these reasons alone would authorize the insertion of those papers, and would recommend them to the inquisitive as a very great improvement in geography, and worthy of attention from the singularity of many circumstances therein recited. Thus much it has been thought necessary to premise with regard to the ensuing work, which it is hoped the reader will, on perusal, find much ampler and more important than this slight sketch can well explain. But as there are hereafter occasionally interspersed some accounts of Spanish transactions, and many observations relating to the disposition of the American Spaniards, and to the condition of the countries bordering on the South Seas, and as herein I may appear to differ greatly from the opinions generally established, I think it behoves {5} me particularly to recite the authorities I have been guided by in these matters, that I may not be censured as having given way either to a thoughtless credulity on one hand, or, what would be a much more criminal imputation, to a willful and deliberate misrepresentation on the other.