Insufficiently paid letters mailed in the United States and addressed to Canada, or _vice versâ_, mailed in Canada and addressed to the United States, on which a single rate of postage or more has been prepaid, shall be forwarded charged with the amount of the deficient postage, to be collected on delivery and retained by the Post Department of the country of destination. The amount of such deficient postage shall be indicated in figures, by the despatching exchange office, on the upper left-hand corner of the address.

When newspapers, periodicals and other printed matter, published or originating in the United States, are brought into Canada and posted there for destinations in the United States, apparently to evade the postage rates or regulations applicable to such matter in the United States, the Canada Post Office may require prepayment of the same to be made at a rate equivalent to double the Canada domestic rates.

Canada: Its Postage Stamps and Postal Stationery — Part 123

The present articles shall be considered additional to those agreed upon between the two offices on the 27th January and 1st February, 1875, and shall come into operation on the 1st of May, 1881.

Canada: Its Postage Stamps and Postal Stationery — Part 123

The Report of June 30, 1882 states that newspapers and periodicals published in Canada (under certain conditions as to form and manner of posting) are transmitted free by Post within the Dominion when posted from the office of publication to regular subscribers, from 1st June, 1882. This must have been due to a Department Order, as the Statutes of Canada reveal no such enactment at this time. The same Report announces the issue of reply post cards, but those will be dealt with later.

Canada: Its Postage Stamps and Postal Stationery — Part 123

Statistics make up most of the Reports until that of 1886, when an item of interest in connection with the completion of the Canadian Pacific Railway is found: "The first through train left Montreal on Monday the 28th June, 1885, and arrived at Port Moody, the Pacific terminus of the road on the 4th July. Mails for British Columbia commenced to pass over the Canadian Pacific Railway by this first train." This marked the independence of Canada from the United States in the matter of transcontinental transportation of mails. The distance from Montreal to Port Moody is given as 2892 miles.