Accordingly four boats were manned with well-armed crews, and with muffled oars set out on a dark night to patrol the river. Philadelphia was reached, and the expedition was almost past the city, when the sentries on one of the British men-of-war gave the alarm. A few scattering shots were fired from the shore; but the jackies bent to their oars, and the boats were soon lost to sight in the darkness. When day broke, Barry was far down the river. Opposite the little post held by the American army, and called Fort Penn, Barry spied a large schooner, mounting ten guns, and flying the British flag. With her were four transport ships, loaded with forage for the enemy's forces. Though the sun had risen, and it was broad day, Barry succeeded in running his boats alongside the schooner; and before the British suspected the presence of any enemy, the blue-jackets were clambering over the rail, cutlass and pistol in hand. There was no resistance. The astonished Englishmen threw down their arms, and rushed below. The victorious Americans battened down the hatches, ordered the four transports to surrender, on pain of being fired into, and triumphantly carried all five prizes to the piers of Fort Penn. There the hatches were removed; and, the Yankee sailors being drawn up in line, Barry ordered the prisoners to come on deck. When all appeared, it was found that the Yankees had bagged one major, two captains, three lieutenants, ten soldiers, and about a hundred sailors and marines,--a very respectable haul for a party of not more than thirty American sailors. The next day a British frigate and sloop-of-war appeared down the bay. They were under full sail, and were apparently making for Fort Penn, with the probable intention of recapturing Barry's prizes. Fearing that he might be robbed of the fruits of his victory, Barry put the four transports in charge of Capt. Middleton, with instructions to fire them should the enemy attempt to cut them out. In the mean time, he took the ten-gun schooner, and made for the Christiana River, in the hopes of taking her into shallow waters, whither the heavier British vessels could not follow. But, unluckily for his plans, the wind favored the frigate; and she gained upon him so rapidly, that only by the greatest expedition could he run his craft ashore and escape. Two of the guns were pointed down the main hatch, and a few rounds of round-shot were fired through the schooner's bottom. She sunk quickly; and the Americans pushed off from her side, just as the British frigate swung into position, and let fly her broadside at her escaping foes.