In September 1621, Governor Nathaniel Butler of Bermuda was woken in the middle of the night to hear a report that one hundred Spaniards had landed on the west part of the islands. Bermuda had long been at risk of attack because of its close proximity to the homebound route of the Spanish treasure fleet, so Butler understandably went on the defensive. He ordered the manning of several forts and repaired to the landing area with twenty armed men, expecting to pick up additional strength along the way. Rather than find an invading enemy, Butler and his men found a group of Portuguese and Spanish men, women, and children, whose ship—the 300-tonne, Portuguese-owned San Antonio—had been separated from the treasure fleet by a bad storm and wrecked upon the rocks ten miles west of the islands. Saving what goods they could carry, most of the castaways made their way to Mangrove Bay at the north part of Somerset Island in a small cockboat.