For this service the Canadian post office agreed to pay the United States department the sum which the latter would have been entitled to collect on the same number of United States letters passing between Burlington and New York. As the mails were contained in a sealed bag, the United States post office had no means of arriving at the amount due to them for this service, and they agreed to accept the sworn statement of the British and Canadian officials on this point. The convention, also, provided for the interchange of correspondence between Canada and the United States. According to the practice of the period, a letter from Montreal for New York, for instance, was chargeable with the postage due for conveyance from Montreal to the United States boundary. This was collected by the Canadian post office. In addition to this, the United States post office charged the postage due to it for the conveyance from the boundary to New York. The arrangements for the collection of the postage due to each administration were somewhat peculiar. On a letter from Canada to the United States, the Canadian postage as far as Burlington had to be paid at the time the letter was posted. The United States postage was collected from the person to whom the letter was delivered. On letters passing the other way, that is, from the United States to Canada, another arrangement was possible. The sender could, of course, if he chose, pay the United States postage to Burlington, and the Canadian post office would collect its own postage from the addressed. But besides this arrangement, which was common to letters passing in either direction, a person in the United States could post a letter for Canada entirely unpaid, and the total amount due would be collected on the delivery of the letter to the person addressed in Canada. In this case, the postage due to the United States was collected by the postmaster at Montreal, who assumed the duties of agent, in this respect, for the United States post office. The United States did not allow any of their postmasters to act as agents for the collection of Canadian postage in the United States, alleging that there were too many post offices in that country for Burlington to look after them properly. The convention of 1792 contained a feature which was at that time novel in post office arrangements. It provided for the conveyance of periodical magazines between Canada and Great Britain, charging for its services the unusually low figure of eight cents a magazine. The convention was signed by the deputy postmaster general of Canada and the postmaster general of the United States.