Very little was known about India until Alexander the Great led his conquering army across the Punjaub (or, more properly, "Panch jeeb," or five tongues, from the five rivers that water this portion of Northern India) to the banks of the Hydaspes and the Hyphasis. The armies of Alexander had hitherto visited no country which was so fertile, populous, and abounding in the most valuable productions of nature and art as that portion of India through which they marched. Fortunately for the Greeks, Alexander had with him a few men who were admirably qualified to observe and describe the country. At the mouth of the Indus the army and fleet of Alexander parted company. The troops proceeded by land. Nearchus took charge of the ships, sailed down the Indus, and from its mouth, round the southern coast of Asia, to the mouth of the Euphrates. The results of his observations during the voyage were taken down and preserved. This expedition, undertaken 325 B .C., furnished a vast amount of information in regard to India, its extent and wonderful resources. Rome and most of her prosperous and civilized provinces were also very familiar with the silks, brocades, fine muslins, gems of great value, spices, and many other manufactures and products of the remote East. The Latin name of rice, _Oryza sativa_, is derived from the country, Orissa, whence the Romans first obtained it. During the so-called Dark Ages which followed the subversion of their Western Empire the trade with India was greatly diminished, though it never entirely ceased in parts of Europe, especially as some of the productions of the East had been consecrated to the services of the Roman Catholic ritual, and have ever since continued in request with the Christian churches of Greece and Rome. Even in the remote island of Great Britain, and in the semi-barbaric Saxon period, some of the precious spices and scented woods of India had been carefully treasured by the Venerable Bede and his co-laborers in their bleak northern monastery at Jarrow. In fact, at the very dawn of European civilization, under the good and wise Alfred the Great, English missionaries are said to have found their way to the coast of Malabar. The great seat of Eastern trade was, down to the eleventh century, the city of Constantine the Great. Amalfi, Venice, and many other enterprising Italian republics acquired about this time great commercial importance, owing to their Eastern trade, which they extended to Egypt and the Persian Gulf. In the twelfth and thirteenth centuries some of the more adventurous Italians found their way to various parts of Hindostan. One of these, the famous Marco Paulo, has given to the world much curious information about the regions which lie between the Himalaya Mountains, the Indian Ocean, and the numerous islands bordering on the Celestial Empire and on India proper.