Oglethorpe captured the Fort at Picolata without difficulty, and after considerable delay advanced his whole force upon St. Augustine. The fleet, which had by this time arrived, was moored across the harbor, and one vessel stationed off the mouth of Matanzas River, to prevent the arrival of supplies from that quarter. A company of eighty Scotch settlers from Georgia, all dressed in Highland costume, together with forty Indians, were stationed at Fort Mosa, under Colonel Palmer, with orders to avoid a battle, but to be vigilant in scouring the country, to intercept all supplies, and to encamp every night at a different place. Colonel Vanderdussen, who had marched from the St. Johns River by the beach, was ordered to build a battery at Point Quartell (north beach), while Oglethorpe, with a regiment of Georgians and the main body of the Indians, landed on Anastatia Island, and began the construction of a battery at the north end of the main island. Aware that his force was too small to carry an assault on the castle, to which the inhabitants and forces had all retired, Oglethorpe determined to reduce the fort by bombardment, while he cut off all supplies by a blockade. The site of the first battery constructed on the island has long since become the channel of the river. The high ridge to the west of the lighthouse, on which Mr. Aspinwall has lately built a small building, probably extended at least half a mile north of the present shore line. It was on this ridge that Oglethorpe built his first battery, and having mounted in it several eighteen-pound cannon, he sent a message to the Spanish governor summoning him to surrender.