First Salute - Barbara Wertheim Tuchman [135]
On March 21, Sandwich forwarded an intelligence report to Rodney telling of a fleet of 25 sail about to leave from Brest, though Sandwich could not say where it was destined; probably, he suggested, to the West Indies and afterward to North America or to join the Spanish at Cádiz to “check your conquests.” His supposition was correct, if not alert, for this was de Grasse departing with his fleet on the first leg of his journey to America, which was already public knowledge. Mme. du Deffand, Walpole’s faithful correspondent on all the gossip of the French capital, had already written to him about a regiment in Saint-Simon’s command “which is one of those destined for America. Voilà nouvelles publiques.” (This is public news.) Public as it was, the report of the enemy’s approach, which was important for Rodney to know, did not reach him until a week after de Grasse had already arrived in the Leeward Islands and had met Hood in combat.
The Admiralty’s dispatches were sent by the cutter Swallow, evidently under an impression of speed derived from her name. Though fast for its size, a cutter, a single-masted vessel, carried only a small portion of the sail area of a frigate in which to catch the propelling winds. In contrast, the Americans, for the urgent correspondence between Rochambeau and de Grasse, used the French frigate Concorde, which zipped back and forth between Boston and the Leeward Islands in rapid transits of sixteen and eighteen days. The difference in sailing time was not simply a matter of ships but because the British, certain they knew best about everything oceanic, persisted in bucking the Gulf Stream. Flowing in a peculiar northerly circular course, the current slowed progress from Europe to the Caribbean while its swift current in the Atlantic shortened mail time from Europe to America. Traced first by whalers of Nantucket who followed the track of the whales, the course and speed of the stream was made known to Benjamin Franklin when he was Postmaster General by his cousin Captain Timothy Folger of Nantucket for use by the masters of mail packets crossing the ocean. Folger explained why American captains of merchant ships made faster time from London