Instead of going out to seek prizes to procure funds to be applied to the support of the small navy, Captain Barry, on November 21, 1781, was directed to take Lafayette to France "on business of the utmost importance to America." So urgent was this mission that Barry was directed to take part of the crew of the "Deane," place them on the "Alliance" and to take such French seamen as the Consul could procure. If still short of men the Governor of Massachusetts should be applied to for permission to impress seamen wherever found. Besides Lafayette, his brother-in-law, Vicomte de Noailles, General Du Portail, Colonel Gouvion, Major La Combe and others were also taken on the "Alliance."
Morris directed that "the safe and speedy arrival of Marquis Lafayette is of such importance that I think it most consistent with my duty to restrain you from cruising on the passage. You are, therefore, to avoid all vessels and keep in mind as your sole object to make a quiet and safe passage to some port in France."
Regarding stores for the accommodation of the French gentlemen, "Let it be done with discretion; remember we are not rich enough to be extravagant nor so poor as to act meanly." If funds were needed for a return cruise Barry was advised to "prevail with the Marquis to give you credit, but you must remember that all the money we have or can get in France will be wanted for other more important purpose, therefore, I charge you not to expend one livre more than is absolutely necessary."
The "Alliance" sailed from Boston on December 23, 1781, and arrived at L'Orient, on January 18, 1782. During the voyage a British ship appeared in sight, "as if she could give them sport," as Barry's crew often wishing "Lafayette was in France," stated it. Barry's peremptory order to avoid all vessels and take no prizes debarred an encounter with the enemy. The crew manifested discontent at avoiding the possible prizes and, relates Kessler, this appeared to increase the conflict in Barry's mind between the call of duty and his inclination. Instead of reprobating and promptly punishing what on other occasions would have been the case, he was governed by a sullen silence which, if propriety permitted him to break, would have pronounced: "I also wish the Marquis were in France." But duty triumphed then as ever with Barry. As speedily as wind and wave and skill could force onward the "Alliance" she sped on her mission of the "utmost importance," and in twenty-three days Lafayette was in France.