It will probably be admitted on all hands, at the present day, that Mr. Canning's scruple was without foundation. The treaty had been negotiated by this accomplished statesman, under the full knowledge that the Constitution of the United States reserves this power to the Senate. That it should be exercised was, therefore, no more matter of complaint, than that the treaty should be referred at all to the ratification of the Senate. The course pursued by Mr. Canning was greatly to be regretted, as it postponed the amicable adjustment of this matter for eighteen years, not without risk of serious misunderstanding in the interval. Attempts were made on the part of England, during the ministry of Lord Melbourne, to renew the negotiation with the United States, but without success. Conventions between France and England, for a mutual right of search within certain limits, were concluded in 1831 and 1833, under the ministry of the Duc de Broglie, without awakening the public sensibility in the former country. As these treaties multiplied, the activity of the English cruisers increased. After the treaty with Portugal, in 1838, the vessels of that country, which, with those of Spain, were most largely engaged in the traffic, began to assume the flag of the United States as a protection; and in many cases, also, although the property of vessels and cargo had, by collusive transfers on the African coast, become Spanish or Portuguese, the vessels had been built and fitted out in the United States, and too often, it may be feared, with American capital. Vessels of this description were provided with two sets of papers, to be used as occasion might require. Had nothing further been done by British cruisers than to board and search these vessels, whether before or after a transfer of this kind, no complaint would probably have been made by the government of the United States. But, as many American vessels were engaged in lawful commerce on the coast of Africa, it frequently happened that they were boarded by British cruisers, not always under the command of discreet officers. Some voyages were broken up, officers and men occasionally ill-treated, and vessels sent to the United States or Sierra Leone for adjudication.