Even if the distinctive colour of this stamp did not make its identification very easy, its peculiar perforation would do so. It is the solitary instance in Section I. in which neither the A nor the B machine was used, but a third machine, which we call “C.” This is hardly the proper place for us to enter into a dissertation on the various perforating machines that were employed by Messrs. Perkins, Bacon & Co., and used by them for perforating the stamps of the Colonies for which they held contracts; but, at all events, the C perforation is to be found, not only in this one St. Vincent stamp, but also more or less frequently in those of Bahamas, Barbados, Ceylon, Natal, Queensland, St. Helena, St. Lucia, Trinidad, and Western Australia. Like the A and B machines, the C machine was a guillotine one, and like them its irregularities prevent us from naming it by any particular gauge. It is generally a rather regular 15½, but also frequently 15, and in some instances we have found it to measure only 14½. It is probable that this machine is also responsible for a perforation of 16, said to have been seen in St. Vincent stamps. It can never be mistaken for the perforation A, for not only is its most frequent gauge a higher one than that to which the A machine usually attains, but its pins, or plungers, make clean-cut circular holes, smaller in size, but otherwise just like the early perforations of the B machine, although, from insufficient care and attention being paid to the working of the machine, it is rather difficult to find specimens that show the holes clean cut on all four sides. This stamp, like those of the preceding issue, is found on both the thin and the thick paper. We give two illustrations of this stamp, Nos. 13 and 14, which are taken from the only two unused specimens we have ever seen, or heard of. No. 13 gauges 15½ on all four sides; this is the gauge which is most frequently found in stamps perforated by the C machine. No. 14 is perforated 15 at the bottom and right side; the top and left side are too ragged to be measured with accuracy, but they appear to be the usual 15½. The gauge of 14½ (and that of 16, if it exists) must have been present in a very limited portion of the line of pins, as it is very rarely met with. Issue 3. _Between 1863 and 1866._ 1d., bright rose-red; many shades, from pale to deep. 6d., blue-green; very slight shades, all dark. The two stamps constituting this issue differ in no respect from those of Issue I., except in the perforation, which is now B, or B×A, instead of A. It is not possible to say at what precise date the B perforation first came into use. One thing which is certain is, that it, as well as the compound B×A, was known to philatelists as existing in these two values before December, 1866, at which date both perforations A and B as well as the compound B × A, were described by a writer in the _Stamp Collector’s Magazine_.