On Sundays Postmasters in Canada West are at liberty to close their offices to the public. When an office in Canada West is closed to the public on Sunday it must be closed to all persons alike, and no exceptional or partial delivery to particular persons can be allowed. [Sidenote: Sundays, Canada East.] In Canada East, Postmasters keep their offices open on Sundays at least one hour either before or after Divine Service, as may be most convenient to the public generally. [Sidenote: Notice of hours.] A Notice, stating the hours at which the office is opened and closed, should be posted in every office, in such a position as may be readily observed by the public. <tb> MAILS. [Sidenote: Canada railways.] Mails are conveyed twice each way every day, except Sunday, over the principal lines of railway in Canada. Over the less important lines of railway they are carried only once each way every day, except Sunday. [Sidenote: Canada common roads.] Mails are also conveyed once each way every day, except Sunday, over the principal lines of common road, and once, twice, or three times per week over the less important lines of common road. [Sidenote: Lower Provinces.] The postal communication between Canada and the Lower Provinces is three times per week each way <i>via</i> Quebec, and once per fortnight each way by Cunard Steamers <i>via</i> Boston and Halifax. Also twice per week each way in summer <i>via</i> Portland. [Sidenote: Postal routes to the several portions of the world]. The most speedy and direct postal route from Canada to almost every portion of the globe, with the exception of the Continent of North America, the Isthmus of Panama, and a portion of the West India Islands having direct communication with New York, is by way of England, from whence mails for the several British Colonies and Foreign Countries mentioned in the tables at pages 36, 37, 38, and 39, are regularly despatched. [Sidenote: Do. to North American Continent, Isthmus of Panama, W. Indies, &c.] The most speedy and direct postal route from Canada to all parts of the Continent of North America, the Isthmus of Panama, and a portion of the West India Islands having direct communication with New York, is <i>via</i> New York. [Sidenote: Mails for England.] Mails for England are despatched twice in each week from Canada, viz.: once by Canadian Steamer sailing every Saturday, from Quebec in Summer and from Portland in Winter; and once by Cunard Steamer, sailing every Wednesday, either from New York or Boston. The following Post Offices in Canada make up mails direct for certain Post Offices in the United Kingdom, viz.:-- Hamilton, Montreal, Toronto, Quebec. Kingston, [Sidenote: Mails for United States.] Mails are exchanged daily with the United States post offices at all the principal frontier points, and closed mails are exchanged daily between the principal cities of Canada and New York and Boston.