Nicolo Polo, the father of this intelligent early traveller, and Maffei Polo his uncle, were Venetian gentlemen engaged in commerce; and appear to have gone into the east, in the prosecution of their trade, in the year 1260. They resided far some time at the court of Kublai-khan, the great emperor of the Mongals or Tartars; and, returning to Venice in 1269, they found that the wife of Nicolo had died during their absence, leaving a son Marco, the author of the following travels, of whom she was pregnant at the time of their departure. These circumstances are detailed in the first section of this chapter, but the date which has been usually assigned for the commencement of this first journey, 1250, is evidently corrupted, as will appear from the following considerations, derived from a comparison of the chronology of the kings and princes, who are mentioned in the travels as reigning at the time. The high probability is, that the obvious mistake, of assuming the year 1250 as the era of the first journey, arose from a careless substitution of the figure 5 for 6 in transcription. Assuming the corrected date of 1260 as the commencement of the first journey of Nicolo and Maffei Polo, this will appear to be consonant with the chronology of the princes with whose reigns their travels were connected; while the date of 1250, adopted by Ramusio and Muller, is totally irreconcilable with the truth of history. They remained one year at the leskar or camp of Bereke-khan, whence they travelled into Bochara, where they tarried three years. From thence they spent one year on their journey to the court of Kublai-khan, and were three years on their journey back to Venice. But as they remained some time at the residence of Kublai-khan, one year may be allowed for that circumstance; and this first journey may therefore be allowed to have occupied nine years in all. Kublai-khan reigned supreme emperor of the Mongals from 1259 to 1294, in which last year he died at eighty years of age. If, therefore, Nicolo and Maffei had set out upon their first journey in 1250, they must have arrived at the imperial residence of Cambalu, or Pekin, in 1255, at the latest, or four years before Kublai-khan ascended the throne. Their first journey commenced while Baldwin II. was emperor of Constantinople, who reigned from 1234 to 1261. The khan of Kiptschak, or the western division of the vast empire of the Mongals, at the time of this journey, was Bereke, who ruled from 1256 to 1266. Holagu-khan, who was then at war with Bereke, did not begin to reign till 1258. Hence it follows, that they could not have commenced their first journey at the very earliest before 1258, or 1259 rather; as it is not to be supposed that Holagu would enter upon a dangerous war in the first year of his reign. Upon the whole, therefore, the date of 1260, for the commencement of the first journey, as already observed, is perfectly consistent with the chronology of history.