On 12 April 1781 Vice Admiral George Darby's squadron of 29 ships of the line escorting 100 store ships from England entered the bay, despite the Spanish fleet. The Spanish, frustrated by this failure, for the first time in the siege opened up a terrific barrage while the stores were unloaded. Although they caused great damage to the town, the South Mole where the ships unloaded their stores was out of their reach. The civilian population of about 1,000 sailed with Darby for England on 21 April, leaving the garrison with fewer mouths to feed and allowing them to operate more freely. Again the fleet left without hindrance during the night and slipped past the blockading Spanish fleet. Provisions for the garrison were now plentiful, including black powder, guns and ammunition as well as food and other supplies.