The perforation used for the stamps of this series had a gauge of 12, as with the stamps of the preceding issue, and was the work of single line or guillotine machines. That is, each line of perforation, both horizontally and vertically, represented a separate stroke on the machine. The _Monthly Journal_ for February, 1899, lists a minor variety of perforation in the 2c, 3c, 6c, 12-1/2c and 15c denominations in which the measurement is 11-1/2 x 12. Whether a machine with a gauge of 11-1/2 was in temporary use at some time or other is uncertain but if such was the case it seems strange that no copies are known perf. 11-1/2 all round or perf. 12 x 11-1/2. Even if it were due to a slight error in the placing of the perforating needles in some part of the full row it is strange that specimens gauging 12 x 11-1/2 are not known. We have been unable to find any further references to these varieties other than that stated above so that, until more information is forthcoming on the subject, they should be accepted with reserve. The 15c of this series is known entirely imperforate and Mr. Howes records the 1/2c as existing in a horizontal pair, imperforate between. The only "split" found in connection with this series occurs in the case of the 6c denomination, diagonal halves of which are known to have done postal duty as 3c. These appear to have been entirely unauthorized though, as they undoubtedly passed through the mail, they have an interest to collectors of stamps on cover. _Reference List._ 1868. Engraved and Printed by the British American Bank Note Company, at Ottawa. Wove paper. Perf. 12. 16. 1/2c black. Scott's No. 21. 17. 1c brown red. Scott's No. 22. 18. 2c green, Scott's No. 23. 19. 3c red, Scott's No. 24. 20. 6c brown, Scott's No. 25. 21. 12-1/2c blue, Scott's No. 26. 22. 15c lilac, Scott's No. 27. 23. 15c gray, Scott's No. 39. CHAPTER VIII.--_The 1c Orange of 1869._ The 1c and 3c stamps of 1868 were so alike in color that it was soon found that confusion was easily possible between the two values. Early in 1869, therefore, the color of the 1c was changed to orange to prevent further mistakes. The exact date at which this change took place is not known, but in the _Stamp Collector's Magazine_ for March 1st, 1869, we read:-- We have just received copies of the one cent printed in brilliant orange. No doubt this colour has been adopted in order better to distinguish it from the 3 cents, which it has hitherto too nearly approached. From the above extract it would seem that the orange colored stamps were in use at least as early as February and though it has been asserted that the change took place on January 1st, 1869, we believe there are no official documents or early dated specimens in existence that would substantiate this statement.