Sir, A Treaty of Commerce was signed yesterday at Paris between Great Britain and France. Its main provisions are—a renewal of the Commercial Treaty of 1860 up to the 30th of June, 1877, including most-favoured-nation treatment, the national treatment of vessels, and the settlement of the mineral oils question at the close of the present year. There is, I believe. an Article in it providing for a Supplementary Convention to decide upon questions of "expertise" and other matters of commercial interest.