In the night-time bats swarmed from the marshes formed by this river, and these animals, which are as big as pigeons, tormented the Spaniards with their painful bites. Those who have been bitten confirmed this fact, and the judge Enciso who had been expelled, when asked by me concerning the danger of such bites, told me that one night, when he slept uncovered because of the heat, he had been bitten by one of these animals on the heel, but that the wound had not been more dangerous than one made by any other non-poisonous creature. Other people claim that the bite is mortal, but may be cured by being washed immediately with sea-water; Enciso also spoke of the efficacy of this remedy. Cauterisation is also used, as it is employed for wounds caused by native poisoned arrows. Enciso had had experience in Caribana, where many of his men had been wounded. The Spaniards returned to the Gulf of Uraba only partly satisfied, for they had brought back no provisions. Such a terrible tempest overtook them in that immense gulf on their return voyage, that they were obliged to throw everything they had stolen from those wretched fishermen into the sea. Moreover the uru, that is to say, the barques, were lost and with them some of the men on board. While Vasco Nuñez was exploring the southern extremity of the gulf, Roderigo Colmenares advanced, as had been agreed, by way of the river bed towards the mountains along the eastern coast. At a distance of about forty miles, that is to say, twelve leagues from the river's mouth, he came upon some villages built on the river bank; the chief, that is to say, chebi, was named Turvi. Colmenares remained with that cacique, while Vasco Nuñez, who had meanwhile returned to Darien, marched to meet him. When the men of the two companies had been somewhat recuperated by the provisions which Turvi furnished, their leaders continued their march together. About forty miles distant they discovered an island in the river, which was inhabited by fishermen, and as they found wild cinnamon trees there, they named the island Cannafistula. There were some sixty villages in groups of ten houses each on this island, and the river on the right side was large enough both for the native boats and for the brigantines. This river the Spaniards named Rio Negro.