One peculiarity resulting from the use of papers of such varying quality is an apparent difference in the size of stamps of the same denomination. For instance, the stamps on the thinner kinds of paper generally measure 22 x 18 mm., while those on thicker paper measure 22-3/4 x 17-1/2 mm. and papers of other thicknesses provide still other measurements. These differences in size (fairly considerable in relation to the comparatively small area of a postage stamp) proved very puzzling to collectors of twenty years or so ago for, though it was felt that the stamps came from the same plates, it was at the same time found impossible to account for such varieties, except on the hypothesis that all the impressions of the plate were not all applied alike or that the hardening of the plates before printing resulted in contraction in parts with a consequent variation in the size of different impressions. The same sorts of varieties have been noticed in many other stamps printed by the line engraved process, notably in such stamps as the "pence" Ceylons, and proper investigation finally proved beyond a shadow of doubt that these differences in size were due to nothing more than uneven contraction of the paper after printing. It must be understood that in printing stamps by the line-engraved method the paper usually has to be slightly wetted (this was an invariable rule at the time these early Canada stamps were printed) and it can be easily seen that the wetting would have quite different results on different qualities of paper. Some would be more absorbent than others and would stretch while damp and contract again when drying. The amount of wetting administered would, also, result in differences even in the same qualify of paper. These variations in the size of the design, therefore, while interesting in themselves as examples of paper vagaries, are of little, if any, philatelic importance. Bi-sected stamps were not used in Canada to anything like the same extent that similar varieties were used in the other British North American provinces. The 6d is catalogued as having been divided diagonally and the halves used as 3d stamps, though there can have been no real necessity for such bi-section. A bi-sected stamp of quite another character was mentioned in the _Monthly Journal_ for April, 1898, as follows:-- The _Post Office_ describes a so-called "split provisional" of the early 3d stamp, which is described as consisting of one and a half of the unperforated 3d on wove, upon an entire envelope postmarked "Port Hope, July 16th, 1855, Canada, Paid 10c." Our contemporary does not appear to perceive that the postmark plainly indicates that the supposed half stamp is really only a badly cut copy; the 3d of Canada passed for 5 cents, and as this letter is plainly marked "Paid 10c", the stamps upon it evidently passed as two 3d, not as one and a half, which would have corresponded to no rate of postage.