"The product of pearls is uncertain. Since the advent of the Jerome fathers the business has been suspended until the arrival of your Highness. Two caravels have gone now, but few will go, because the fathers say that the traffic in Indians is to cease and the greatest profit is in that ... On your Highness's estates there are 400 Indians who wash gold, work in the fields, build houses, etc.; ... they produce from 1,500 to 2,000 pesos profit every gang (demora).... I send in this ship, with Juan Viscaino, 8,000 pesos and 40 marks of pearls. There remain in my possession 17,000 pesos and 70 marks of pearls, which shall be sent by the next ship in obedience to your Highness's orders, not to send more than 10,000 pesos at a time. The pearls that go now are worth that amount. Until the present we sent only 5,000 pesos' worth of pearls at one time." The yearly output of gold fluctuated, but it continued steadily, as Velasquez wrote to the emperor in 1521, when he made a remittance of 5,000 pesos. Six or seven years later, the placers, for such they were, were becoming exhausted. Castellanos, the treasurer, wrote in 1518 that only 429 pesos had been received as the king's share of the last two years' smelting. Some new deposit was discovered in the river Daguáo, but it does not seem to have been of much importance. From the year 1530 the reports of the crown officers are full of complaints of the growing scarcity of gold; finally, in 1536, the last remittance was made; not, it may be safely assumed, because there was no more gold in the island, but because those who had labored and suffered in its production, had succumbed to the unaccustomed hardships imposed on them and to the cruel treatment received from their sordid masters. Besides the river mentioned, the majority of those which have their sources in the mountains of Luquillo are more or less auriferous. These are: the Rio Prieto, the Fajardo, the Espíritu Santo, the Rio Grande, and, especially, the Mameyes. The river Loiza also contains gold, but, judging from the traces of diggings still here and there visible along the beds of the Mavilla, the Sibúco, the Congo, the Rio Negro, and Carozal, in the north, it would seem that these rivers and their affluents produced the coveted metal in largest quantities. The Duey, the Yauco, and the Oromico, or Hormigueros, on the south coast are supposed to be auriferous also, but do not seem to have been worked. The metal was and is still found in seed-shaped grains, sometimes of the weight of 2 or 3 pesos. Tradition speaks of a nugget found in the Fajardo river weighing 4 ounces, and of another found in an affluent of the Congo of 1 pound in weight.