SIR,--I had the honor of addressing you in a letter of May the 4th, from Marseilles, which was to have gone by the last packet. But it arrived a few hours too late for that conveyance, and has been committed to a private one, passing through England, with a promise that it should go through no post office. I was desirous, while at the seaports, to obtain a list of the American vessels which have come to them since the peace, in order to estimate their comparative importance to us, as well as the general amount of our commerce with this country, so far as carried on in our own bottoms. At Marseilles, I found there had been thirty-two, since that period; at Cette, not a single one; at Bayonne, one of our free ports, only one. This last fact I learned from other information, not having visited that place; as it would have been a deviation from my route, too considerable for the importance of the object. At Bordeaux, Nantes, and L'Orient, I could not obtain lists in the moment; but am in hopes I shall be able to get them ere long. Though more important to us, they will probably be more imperfect than that of Marseilles. At Nantes, I began with Monsieur Dobrée an arrangement of his claims. I visited the military stores, which have been detained there so long, opened some boxes of each kind, and found the state of their contents much better than had been represented. An exact list of the articles is to be sent me. The importations into L'Orient of other fish oils, besides those of the whale, brought to my notice there a defect in the letter of Monsieur de Calonnes, of October the 22d, which letter was formerly communicated to you. In that, _whale_ oil only was named. The other fish oils, therefore, have continued to pay the old duties. In a conference with Monsieur de Villedeuil, the present Comptroller General, since my return, I proposed the extending the exemption to all _fish oils_, according to the letter of the Hanseatic treaty, which had formed the basis of the regulations respecting us. I think this will be agreed to. The delays of office first, then the illness of Monsieur de Calonnes, and lastly, his removal and the throng of business occasioned by the Assemblée des Notables, have prevented the reducing the substance of the letter into the form of an _Arret_, as yet; though I have continued soliciting it as much as circumstances would bear. I am now promised that it shall be done immediately, and that it shall be so far retrospective to the date of the letter, as that all duties paid since that, shall be refunded.