The people who had been sent for provisions having returned, the admiral passed over the mountain along a path so narrow, steep, and winding, that the horses were led over with much difficulty. They now entered the district of Cibao, which is rough and stoney and full of gravel, yet plentifully covered with grass, and watered with several rivers in which gold is found. The farther they went in this country they found it the rougher and more uncouth, and everywhere encumbered with mountains, on the summits even of which they found grains of gold, which is washed down from the tops of these mountains by the great rains and torrents into the beds of the rivers, and there found in small dust, sand, or grains, interspersed with some of a larger size. This province is as large as Portugal, and abounds in mines and brooks producing gold; but for the most part has few trees, and these are mostly pines and palms of several sorts, growing on the banks of the rivers. As Ojeda had travelled before into this country, the Indians had some knowledge of the Christians; and understanding that they came in search of gold, the natives came to meet the admiral everywhere during the march with small quantities of gold which they had gathered, and bringing presents of provisions. Being now 18 leagues from Isabella[9], and the country he had marched over from the Pass of Cibao very rugged, the admiral ordered a fort to be constructed in a strong and very pleasant situation, to command the country about the mines, and to protect the Christians that might be employed there in procuring gold, and gave it the name of the castle of St Thomas. He gave the command of this new fort to Don Pedro Margarite, with a garrison of 56 men, among whom were workmen of all kinds for building the castle, which was constructed of clay and timber, as of sufficient strength to resist the efforts of any number of Indians that might come against it. On breaking ground for the foundations of the fort, and cutting a rock to form its ditches, at two fathoms below the surface, they found several nests made of hay and straw, containing instead of eggs three or four round stones as large as oranges, as artificially made as if they had been cannon-balls [10]. In the river that runs at the foot of the hill on which the castle was built, they found stones of several colours, some of them large, of pure marble, and others of jasper.