Raleigh, withdrawn from active labors by his imprisonment, was not idle. He turned to intellectual pursuits, and, with many minor pieces in prose and verse, executed his greatest work, "The History of the World,"--a project of such vast extent, that the bare idea of his undertaking it excites our admiration. As an author, he stands on an eminence as high as that which he obtained in other paths. Hume says, "He is the best model of our ancient style;" and Hallam confirms the judgment. His imprisonment lasted thirteen years. At the expiration of that time, he had influence to have his sentence so far remitted as to allow him to go on a second expedition in search of Eldorado. Twenty years had elapsed since the former expedition; and the present was of a magnitude more like a national enterprise than a private one. Sir Walter's own ship, "The Destiny," carried thirty-six guns and two hundred men. There were six other vessels, carrying from twenty-five guns to three each. Raleigh embarked all his means in this expedition. His eldest son commanded one of the ships; and eighty of his companions were gentlemen volunteers and adventurers, many of them his relations. Those who have thoughtfully considered Raleigh's career have seen reason to doubt whether he really believed the stories which he was so anxious to impress upon others. They have thought it more likely that his real object was to emulate the fame of Cortez and Pizarro; to dispossess Spain of some portion of her conquests in South America, and transfer them to his own country. This latter object was admissible at the time of his first expedition, because Spain and England were then at war; but was not so on the second, as the two nations were then at peace. But Raleigh had reason to think, that, if he could succeed in his object, there was no danger of his being called to very strict account respecting his measures. He arrived off the coast of Guiana on the 12th of November, 1617; having had a long and disastrous voyage. One ship had left him, and returned home; another had foundered; forty-two of his men had died; many were suffering from sickness, and himself among the number. But he found the Indians friendly, and not forgetful of his former visit. He writes to his wife, "To tell you that I might be here king of the country were a vanity; but my name hath still lived among them here. They feed me with fresh meat, and all that the country yields. All offer to obey me." Being too feeble from sickness to go himself, he sent forward an expedition, under Capt. Keymis, to enter the Orinoco, and take possession of the mines. Five companies of fifty men each, in five shallops, composed the expedition; Raleigh, with the remainder of his vessels, repairing to Trinidad to await the result.