_A New History of the Conquest of Mexico._ In which Las Casas' Denunciations of the Popular Historians of that War are fully vindicated. By ROBERT ANDERSON WILSON, Counsellor at Law; Author of "Mexico and its Religion," etc., Philadelphia: James Challen & Son. Boston: Crosby, Nichols, & Co. (SECOND NOTICE.) According to the well-authenticated legend of the martyrdom of Saint Lawrence, the Saint, as he lay upon the grid-iron, conscious that he had been sufficiently done on one side, begged the cooks, if it were a matter of indifference to them, to turn him on the other. Common humanity demanded compliance with so reasonable a request. We fancy that we hear Mr. Wilson, preferring a similar petition; and we hope we are too good-natured to be insensible to the appeal. We cannot, at this moment, indeed, think of him otherwise than good-naturedly. With many things in his book we have been highly pleased. The number, the novelty, and the variety of his blunders have given us a very favorable impression of his ingenuity, and have afforded us constant entertainment in what we feared was to be a drudgery and a task. We had intended to cull some of these beauties for the amusement of our readers and the personal gratification of Mr. Wilson himself. But, as children, gathering shells on the sea-shore, resign, one after another, the treasures which they have collected, and grasp at newer, and, therefore, more pleasing specimens, which are abandoned in their turn, so we, finding our stores accumulate beyond our means of transportation, and tantalized by a richness that made the task of selection an impossible one, have been forced to relinquish the prize and come away with empty hands. If there be, in the compass of what the author calls "these volumes,"--though to us, perhaps from inability to distinguish between unity and duality, his work appears to be comprised in a single tome,--a sentence decently constructed, a foreign name correctly spelt, a punctuation-mark rightly placed, a fact clearly and accurately stated, or an argument that is not capable of an easy reduction to the absurd, we have not been so unfortunate as to discover it. Mr. Wilson is a man who, to use Carlyle's favorite expression, has "swallowed all formulas." The principles that have generally been held to govern the use of language appear to him mere arbitrary rules, invented by the "sevenfold censorship" and the Spanish Inquisition, for the purpose of preventing the free communication of ideas. All such trammels he rejects; and, accordingly, we have to thank him, so far as mere style is concerned, for an uninterrupted flow of pleasure in the perusal of his book, adorned as it is with "graces" that are very far indeed "beyond the reach of Art."