Not only the form of the ships, but the circumstances of the voyage taken notice of by this ancient navigator stamp his relation with authenticity. The strong current between Madagascar and Zanzebar rendering it next to impossible for ships to get back to the northward; the black natives on that coast, the products of the country which he enumerates; the true description of the Giraffe or Camelopardalis, at that time considered in Europe as a fabulous animal, are so many and such strong evidences in favour of his narrative, as to leave little doubt that he either was himself upon the east coast of Africa, or that he had received very correct information from his Chinese shipmates concerning it. Yet Doctor Vincent has asserted, in his _Periplus of the Erythrean Sea_[4], that in the time of this Venetian traveller none but Arab or Malay vessels navigated the Indian Ocean. With all due deference to such high authority I cannot forbear observing that the simple relation of Marco Polo bears internal and irresistible evidence that the fleet of ships in which he sailed were Chinese, of the same kind to all intents and purposes as they now are. Nor have we any reason for doubting the authority of the two Mahomedans who visited China in the ninth century, when they tell us that Chinese ships traded to the Persian gulph at that time. In a chart made under the direction of the Venetian traveller and still preserved in the church of St. Michael de Murano at Venice, the southern part of the continent of Africa is said to be distinctly marked down, though this indeed might have been inserted after the Cape of Good Hope had been doubled by the Portuguese. [4] In the very next page (202) he however corrects himself, by observing that _either_ the Chinese or Malays navigated as far as Madagascar. Whether the Prince of Portugal had seen or heard of this chart, or consulted the Arabian Geographers, or had read of the circumnavigation of Africa in the first translation of Herodotus that made its appearance but a few years before the discovery of the southern promontory of this continent by Bartholomew Diaz; or whether the voyages were undertaken at that time on a general plan of discovery, authors seem not to have agreed, but the opinion, I understand, among the Portugueze is that Henry had good grounds for supposing that the circumnavigation of Africa was practicable.