Juan Cevicos, a resident of Manila who is at the Spanish court, writes a memorial (December 20, 1627) on "the inadvisability of a Spanish post in the island of Hermosa." He thinks that the Dutch have established themselves there not so much to pillage the Chinese merchant ships, as to establish a factory on Formosa, from which they can gain the Chinese and Japanese trade. Their success in this would result in the destruction of Macao and ruin the Japan trade for the Philippines; therefore they should be driven out of Formosa, and before they have time to lure the Chinese trade also from the Spaniards. But, even then, it is an expensive and undesirable enterprise for the Spaniards to maintain a fort there, as the island of Formosa is of little importance for its products, and there would be no advantage in making it a way-station for the Chinese trade. To attempt this would but shift thither the scene of hostilities with the Dutch, and impose new burdens on the already overtaxed people of the Philippines. It is useless to keep the island as a port of refuge for the Spanish ships; there is danger that the Chinese will attack it; and even for the conversion of the heathen the king is not under obligations to do more than is required by his subjects in the Philippines. The Jesuit chronicle of events for 1627-28 has much of interest. In July and August, 1627, Tavora equips an expedition to expel the Dutch from Formosa; but it sails too late, and is compelled by storms to return to Cavite, some of the vessels being lost. One of the ships reaches the Spanish fort in Formosa, only to find that one of its officers and some of his men have been slain by treacherous natives. The ship supplies the garrison with the food of which they are in need, and returns to Luzon. Soon afterward a richly-laden Portuguese fleet sails from Manila to Macao, and two Spanish galleons are sent with it as escort, to defend it from the Dutch. The galleons, on the return from Macao, pursue a semi-piratical career for several months, capturing several Siamese vessels with valuable cargoes, by way of reprisal for the injuries inflicted on Spaniards in Siam; and taking other prizes, not all of which are regarded as lawful.