No sooner had Adams got comfortably settled at home than he was obliged to return again to Europe. Franklin, Jay, Laurens, Jefferson, and he were appointed by Congress commissioners to treat for peace, whenever the fitting time should come; and so in February, 1780, he was back in Paris. But peace was still far away in the future, and Adams, meanwhile, finding the intolerable incumbrance of leisure upon his hands, exorcised the demon by writing long letters to de Vergennes upon sundry matters of interest in American affairs. It was an unfortunate scheme. If Nature had maliciously sought to create a man for the express purpose of aggravating de Vergennes, she could not have made one better adapted for that service than was Adams. Very soon there was a terrible explosion, and Franklin, invoked by both parties, had to hasten to the rescue, to his own serious injury. On May 31, 1780, in a letter to the president of Congress, Franklin said: "A great clamor has lately been made by some merchants, who say they have large sums on their hands of paper money in America, and that they are ruined by some resolution of Congress, which reduces its value to one part in forty. As I have had no letter explaining this matter I have only been able to say that it is probably misunderstood, and that I am confident the Congress have not done, nor will do, anything unjust towards strangers who have given us credit." Soon afterward Adams got private information of the passage of an act for the redemption of the paper money at the rate of forty dollars for one in silver. At once he sent the news to de Vergennes. That statesman took fire at the tidings, and promptly responded that foreigners ought to be indemnified for any losses they might suffer, and that Americans alone should "support the expense which is occasioned by the defense of their liberty," and should regard "the depreciation of their paper money only as an impost which ought to fall upon themselves." He added that he had instructed the Chevalier de la Luzerne, French minister to the States, "to make the strongest representations on this subject" to Congress.