The Travels of Marco Polo/Preface/Chapter 16
How Mark Returned From the Mission Whereon He Had Been Sent
When Mark returned from his ambassage he presented himself before the Emperor, and after making his report of the business with which he was charged, and its successful accomplishment, he went on to give an account in a pleasant and intelligent manner of all the novelties and strange things that he had seen and heard; insomuch that the Emperor and all such as heard his story were surprised, and said: "If this young man live, he will assuredly come to be a person of great worth and ability." And so from that time forward he was always entitled MESSER MARCO POLO, and thus we shall style him henceforth in this Book of ours, as is but right.
Thereafter Messer Marco abode in the Kaan's employment some seventeen years, continually going and coming, hither and thither, on the missions that were entrusted to him by the Lord [and sometimes, with the permission and authority of the Great Kaan, on his own private affairs.] And, as he knew all the sovereign's ways, like a sensible man he always took much pains to gather knowledge of anything that would be likely to interest him, and then on his return to Court he would relate everything in regular order, and thus the Emperor came to hold him in great love and favour. And for this reason also he would employ him the oftener on the most weighty and most distant of his missions. These Messer Marco ever carried out with discretion and success, God be thanked. So the Emperor became ever more partial to him, and treated him with the greater distinction, and kept him so close to his person that some of the Barons waxed very envious thereat. And thus it came about that Messer Marco Polo had knowledge of, or had actually visited, a greater number of the different countries of the World than any other man; the more that he was always giving his mind to get knowledge, and to spy out and enquire into everything in order to have matter to relate to the Lord.