At times the natives have found large pieces of ambergris on the coasts. When they discovered that the Spaniards value it, they gathered it, and have made profit from it. The past year of six hundred and two, some natives found in the island of Sebu a good-sized piece of ambergris, and when their encomendero heard of it, he took it, and traded with them secretly for it, on the account of their tribute. It is said that it weighed a good number of libras. Afterward he brought it out and sold it by the ounce at a higher rate. [117] In the province and river of Butuan--which is pacified and assigned to Spaniards, and is located in the island of Mindanao--the natives practice another industry, which is very useful. As they possess many civet cats, although smaller than those of Guinea, they make use of the civet and trade it. This they do easily, for, when the moon is in the crescent, they hunt the cats with nets, and capture many of them. Then when they have obtained the civet, they loose the cats. They also capture and cage some of them, which are sold in the islands at very low prices. [118] Cotton is raised abundantly throughout the islands. It is spun and sold in the skein to the Chinese and other nations, who come to get it. Cloth of different patterns is also woven from it, and the natives also trade that. Other cloths, called medrinaques, are woven from the banana leaf. [119] The islands of Babuytanes [120] consist of many small islands lying off the upper coast of the province of Cagayan. They are inhabited by natives, whose chief industry consists in going to Cagayan, in their tapaques, with swine, fowls, and other food, and ebony spears, for exchange. The islands are not assigned as encomiendas, nor is any tribute collected from them. There are no Spaniards among them, as those natives are of less understanding and less civilized [than the others]. Accordingly no Christians have been made among them, and they have no justices. Other islands, called the Catenduanes, lie off the other head of the island of Luzon, opposite the province of Camarines, in fourteen degrees of north latitude, near the strait of Espiritu Santo. They are islands densely populated with natives of good disposition, who are all assigned to Spaniards. They possess instruction and churches, and have an alcalde-mayor who administers justice to them. Most of them cultivate the soil, but some are engaged in gold-washing, and in trading between various islands, and with the mainland of Luzon, very near those islands. [121]