Sailing on, the ships came off the banks and shoals of Sofala, when the Moor, by signs, warned them to keep a look-out for danger ahead. Standing out to sea, the shoals were passed during the night. Shortly afterwards they sighted another sail ahead, when the _Saint Raphael_, edging out to sea to prevent her escape, quickly got up with her. The boat being sent alongside, two blacks--cafres, as the Portuguese called them--were brought on board the _Saint Raphael_. Immediately a boat was dispatched to Paulo da Gama's ship to bring a black, a native of Guinea, who sailed with him, that he might interpret. The blacks, though from opposite sides of the coast, perfectly understood each other, showing that at that period the language of Congo extended from the Atlantic to the Indian Ocean. The zambuk was laden with pigeons' dung, and was bound for Cambay, where it is used in dyeing stuffs. The Captain-Major gave the blacks biscuit, salt fish, and wine, which they ate and drank with evident satisfaction, not refusing the wine as the Moor had done. The vessel called a zambuk was probably the style of craft similar to the dhow of the present day, with a high stern, the bow sharp and low, and either perfectly open or partially decked over with light planking. The Moor, Davane--which he said was his name--now informed the Captain-Major that farther on they should come to a place of large size, thickly peopled and with much trade, and that from thence he would conduct them to Cambay, where he would load the ships with full cargoes of drugs and spices, as it was a rich country, and the greatest kingdom in the world. The Captain-Major replied that he considered himself fortunate in having met him, and swore that he would reward him richly for the work he performed. Davane then advised him to follow the zambuk, the crew of which, being acquainted with the navigation, would pilot the ships clear of all dangers. Six Portuguese sailors were therefore sent on board her, that no treacherous trick might be played, and the same number of blacks brought to the _Saint Raphael_. Although the zambuk's sails were of matting, she made better way than either of the ships. After steering on for twenty days, they arrived towards the end of March, 1498, off Mozambique, and, piloted by the zambuk, entered the harbour, where they dropped anchor in a spot sheltered from the sea winds. On the shore a large number of houses covered with thatch and many people were seen. The Portuguese sailors were now brought from the zambuk, and the blacks, rewarded with pieces of white stuff, were sent to their own vessel. The blacks having gone on shore and reported how well they had been treated, canoes came off from the beach with cocoa-nuts and hens. The Moor Davane, having received a present of a scarlet cap and a string of coral beads, was carried on shore by Nicolas Coelho, with directions to obtain fresh provisions and to learn where the ships could water.