But at this juncture Commodore Whipple, in the "Providence," hailed the "Queen," and directed Rathburn to edge out of the fleet before the British men-of-war should discover his true character. Rathburn protested vigorously, pointing out the two vessels he had captured, and urging Whipple to follow his example, and capture as many vessels as he could in the same manner. Finally Whipple overcame his fears, and adopted Rathburn's methods, with such success that shortly after nightfall the Americans left the fleet, taking with them eleven rich prizes. Eight of these they succeeded in taking safe to Boston, where they were sold for more than a million dollars. In May, 1779, occurred two unimportant engagements,--one off Sandy Hook, in which the United States sloop "Providence," ten guns, captured the British sloop "Diligent," after a brief but spirited engagement; the second action occurred off St. Kitts, where the United States brig "Retaliation" successfully resisted a vigorous attack by a British cutter and a brig. The record of the regular navy for the year closed with the cruise of the United States frigates "Deane" and "Boston," that set sail from the Delaware late in the summer. They kept the seas for nearly three months, but made only a few bloodless captures. The next year opened with a great disaster to the American cause. The Count d'Estaing, after aimlessly wandering up and down the coast of the United States with the fleet ostensibly sent to aid the Americans, suddenly took himself and his fleet off to the West Indies. Sir Henry Clinton soon learned of the departure of the French, and gathered an expedition for the capture of Charleston. On the 10th of February, Clinton with five thousand troops, and a British fleet under Admiral Arbuthnot, appeared off Edisto Inlet, about thirty miles from Charleston, and began leisurely preparations for an attack upon the city. Had he pushed ahead and made his assault at once, he would have met but little resistance; but his delay of over a month gave the people of Charleston time to prepare for a spirited resistance.