In twenty minutes from the time the Americans had taken possession of the ship they were driven out of her by flames, so rapidly had they spread. The vessel had become so dry under those tropical suns that she burned like pine. By the time the party which had been engaged in the store-rooms reached the deck, most of the others were on board the Intrepid. They joined them, and the order to cast off was given. It was not an instant too soon, for the daring party were just then in the most risky situation they had been in that night. The fire, in fact, had spread with such unexpected rapidity that flames were already shooting from the port-holes. The head fast was cast off, and the ketch fell astern. But the stern fast became jammed and the boom foul, while the ammunition of the party, covered only with a tarpaulin, was within easy reach of the increasing flames. There was no time to look for an axe, and the rope was severed with swords-blows, while a vigorous shove sent the Intrepid clear of the frigate and free from the danger which had threatened her. As she swung clear, the flames reached the rigging, up which they shot in hissing lines, the ropes being saturated with tar which had oozed out through the heat of the sun. The Intrepid did not depend on her sails alone for escape. She was provided with sweeps, and these were now got out and manned with haste, a few vigorous strokes sending the vessel safely away from the flaming frigate. This done, the crew, as with one impulse, dropped their oars and gave three rousing cheers for their signal victory. Their shouts of triumph appeared to rouse the Moors from their lethargy. So rapid and unlooked-for had been the affair, that the vessel was in full flame before the town and the harbor were awake to the situation. There were batteries on shore, and two corsairs and a galley were anchored at no great distance from the Philadelphia, and from these now the boom of cannon began. But their fire was too hasty and nervous to do much harm, and the men of the Intrepid seized their sweeps again and bowled merrily down the harbor, their progress aided by a light breeze in their sails. The spectacle that followed is described as of a beauty that approached sublimity. The ship, aflame from hull to peak, presented a magnificent appearance, the entire bay was illuminated, and the flash and roar of cannon were constant, the guns of the Philadelphia going off as they became heated, and adding to the uproar. She lay so that one of her broadsides was directed towards the town, thus returning the enemy's fire, while the other sent its balls far out into the harbor. "The most singular effect of the conflagration was on board the ship, for the flames, having run up the rigging and masts, collected under the tops, and fell over, giving the whole the appearance of glowing columns and fiery capitals."