2. There shall be reserved for the address a clear space at the lower right hand corner on the "address" side of the card immediately below the words "The space below is reserved for address only," such space so reserved for the address being, at least, 3-1/4 inches long by 1-1/2 inches wide. N. B. It is in the interest of both the Department and those availing themselves of the privilege hereby, granted that the spaces in question should be unconditionally reserved for the purposes intended. If any printing, engraving, or other matter appears on the spaces thus reserved, the Post-Cards cannot be permitted to pass through the mails. Post-Cards may be ordered in sheets of sixteen or less, as desired, or singly; orders therefor, specifying quantity of cards required and number to the sheet, to be given in writing to the nearest Postmaster. POST-OFFICE DEPARTMENT, CANADA. OTTAWA, 9th December, 1897. These "advertisement" cards were issued by the Post Office Department singly, or printed in sheets of eight or sixteen. The single cards came in packages of 100 like the ordinary cards; the eight card sheets were made up in packages of 125 sheets, or 1000 cards all told; and the sixteen card sheets also in packages of 125 sheets, or 2000 cards all told. The reason for this is seen in the requirement that orders for these cards should be for not less than 1000. It is seen from the stamp accounts that the eight card sheets have proven the most popular, about six times as many sheets of this size as of the larger size having been issued in 1910, while the number of cards represented was five times the number of single cards issued. The stock is the same as used for the ordinary cards and the size of the single card is the same, while the arrangement on the sheets and the regulations require that they be cut up into cards of the proper size. The stamp is impressed in the right hand upper corner and is the same as for the ordinary card but printed in carmine. The only other thing on the card as issued is the directions, printed in small black Gothic capitals:--THE SPACE BELOW IS RESERVED FOR ADDRESS ONLY. This is placed about midway between the top and bottom of the card and about as far to the right as it will go. The last of the Queen's head cards were chronicled in the _Monthly Journal_ for 30th July, 1898. These were the reply card and the Postal Union card in a change of color. The reply card was of the usual size, 5 × 3 inches, and had printed inscriptions in black like the single card, save that the word REPLY is placed between the two lines on the card for answer. The stamp is from the same die as the single card but printed in black instead of green. The stock is the usual pale buff.