There are usually reckoned twelve of these islands; but it will appear that if the small islets and rocks are counted, that their whole number will amount to above twenty. They were formerly most of them well inhabited; and even not sixty years ago, the three principal islands, Guam, Rota, and Tinian together, are asserted to have contained above fifty thousand people: but since that time Tinian had been entirely depopulated; and no more than two or three hundred Indians have been left at Rota to cultivate rice for the island of Guam; so that now Guam alone can properly be said to be inhabited. This island of Guam is the only settlement of the Spaniards; here they keep a governor and garrison, and here the Manila ship generally touches for refreshment in her passage from Acapulco to the Philippines. It is esteemed to be about thirty leagues in circumference, and contains, by the Spanish accounts, near four thousand inhabitants, of which a thousand are supposed to live in the city of San Ignatio de Agana, where the governor generally resides, and where the houses are represented as considerable, being built with stone and timber, and covered with tiles, a very uncommon fabric for these warm climates and savage countries. Besides this city, there are upon the island thirteen or fourteen villages. As Guam is a post of some consequence, on account of the refreshment it yields to the Manila ship, there are two castles on the seashore; one is the castle of St. Angelo, which lies near the road where the Manila ship usually anchors, and is but an insignificant fortress, mounting only five guns, {311} eight-pounders; the other is the castle of St. Lewis, which is N.E. from St. Angelo, and four leagues distant, and is intended to protect a road where a small vessel anchors which arrives here every other year from Manila. This fort mounts the same number of guns as the former: and besides these forts, there is a battery of five pieces of cannon on an eminence near the seashore. The Spanish troops employed at this island consist of three companies of foot, betwixt forty and fifty men each, and this is the principal strength the governor has to depend on; for he cannot rely on any assistance from the Indian inhabitants, being generally upon ill terms with them, and so apprehensive of them that he has debarred them the use both of firearms and lances.