overthrow of the Chinese empire by the Mongul Tartars, was an event not to be regretted by the nation at large. By means of the learned and scientific men, who accompanied the expedition from Balk and Samarcand, astronomy was improved, their calendar was corrected, instruments for making celestial observations were introduced, and the direct communication between the two extremities of the empire was opened, by converting the streams of rivers into an artificial bed, forming an inland navigation, not to be paralleled in any other part of the world. It was about this period when the celebrated Venetian traveller Marco Polo visited the Tartar Khan, then sitting on the throne of China; and who, on his return, gave the first accounts of this extraordinary empire; which appeared indeed so wonderful that they were generally considered as his own inventions. His relations of the magnificent and splendid palaces of the Emperor, of his immense wealth, of the extent of his empire, and the vast multitudes of people, were held to be so many fabrications; and as, in speaking of these subjects, he seldom made use of a lower term than millions, his countrymen bestowed upon him the epithet of _Signor Marco Millione_--Mr. Mark Million. They had no hesitation, however, in giving credit to the only incredible part of his narrative, where he relates a few miracles that were performed, in the course of his journey through Persia, by some Nestorean Christians. Young Marco is said to have accompanied three missionaries of the Dominican order, sent from Venice to the capital of China, at the express desire of Kublai-Khan; but, whether they met with little encouragement in the object of their mission, on account of being preceded by the Christians of the Greek church, or their zeal at that time was less ardent than in later days, is not stated; but it seems they did not remain long in the East, returning very soon to their native country much enriched by their travels.