base of offensive and defensive operations in times of war, was, in later years, handed over to the Republic as a result of its successful diplomacy. During this period the fishery question again assumed considerable importance. American vessels were shut out from the waters of certain colonial bays, in accordance with the convention of 1818, and a number of them captured from time to time for the infringement of the law. The United States Government attempted to raise issues which would {376} limit Canadian rights, but all these questions were placed in abeyance for twelve years by the Reciprocity Treaty of 1854, which opened up the provincial fisheries to the people of the United States, on condition of free trade between the provinces and that country in certain natural products of the mines, fisheries, and farms of the two peoples. This measure was in itself an acknowledgment of the growing importance of the provinces, and of the larger measure of self-government now accorded them. The treaty only became law with the consent of the provincial legislatures; and, although the Canadian governments were not directly represented by any of their members, the governor-general, Lord Elgin, who personally conducted the negotiations on the part of England at Washington, in this, as in all other matters touching colonial interests, was assisted by the advice of his responsible ministers. The treaty lasted until 1866, when it was repealed by the action of the United States in accordance with the provision bringing it to a conclusion after one year's notice from one of the parties interested.