The various methods used for separating stamps is the next matter for study. In the earliest times postmasters used ordinary scissors for detaching one stamp from another. The specimens so treated are styled "imperforate." The use of scissors was clearly an awkward way of performing what is now a simple matter, and it is well known that from the outset the need for a more expeditious method was felt. As a consequence many people gave the question of stamp-separating their attention, with the result that, eight years after the advent of the first postage adhesive, Henry Archer patented the rouletting machine, which cut slits along the margins of the stamps. The slits served the same purpose as the perforation holes in the stamps of to-day, but the drawback to this pioneer method was that in pulling one copy from another the labels were likely to become torn. Between 1848 and 1854 Archer tried many systems for separating stamps, and, in the latter year, perfected a machine for perforating instead of rouletting the margins of adhesives.

Most stamps are now described as "perf. 13, 14, or 15," which means that within the space of 2 centimetres a specimen contains 13, 14, or 15 holes. A stamp catalogued as "perf. 15 X 14"—e.g., British fourpenny bright orange, Edward issue—has fifteen holes per 2 centimetres along the top and bottom edges, and fourteen holes along either side. As a difference of perforation often makes a considerable difference in the market value of a stamp, every philatelist should possess a gauge for measuring the holes; these are obtainable from dealers at a cost of sixpence each.

We said at the commencement of this chapter that Great Britain offered the greatest opportunities to the specialist. Let us now see how the stamps of our own country should be treated in a specialized collection. First of all, it should be the aim of the philatelist to procure not merely one specimen of any particular label, but specimens in pairs and in blocks of four or more. Individual copies of the early penny black are worth about two shillings, but four copies in one block would fetch as much as ten to twelve shillings; also a fine copy on a postal wrapper would be much more valuable than a loose specimen. The moral, therefore, is clear: we should never separate costly stamps nor tear them from their envelopes. Young collectors seem to dislike the plan of admitting entire envelopes to their albums, but this is a prejudice which should be overcome.

Postage Stamps having Special Uses 1 Canada: Registered Letter Fee Stamp 2 Belgium: Parcels Post Stamp 3 U.S.A.: Parcels Post Stamp 4 Italy: Unpaid Tax Stamp 5 India: Telegraph stamp 6 Germany: Official stamp 7 Austria: Stamp for franking newspapers 8 Sweden: Official stamp 9 Spain: War-tax stamp levied on letters

An ideal first page for a special collection of British stamps would show a whole wrapper bearing a nice copy of the penny black, then the individual stamp in pairs or blocks, followed by a somewhat similar arrangement affecting the sister stamp—the twopenny blue.

The page should not be crowded with specimens, but much space ought to be given up to explanatory written matter. At the head of the page, for instance, the following might be neatly printed: "Line-Engraved Stamps. Issued May 1st, 1840." Elsewhere room might be found for the statement that the adhesives given on the page were engraved by Mr. Frederick Heath, and printed by the famous firm of Perkins, Bacon and Co.; whilst below each stamp the particular watermark, paper, and method of separation should be mentioned. Nor should the notes end here; any little piece of postal information which may be discovered should be added to swell the interest of the collection. As an example of such matter, we may quote the following recipe for making red obliterating ink, which was sent to every postmaster in the kingdom when the penny black was first issued:

Take 1 lb. printer's red ink,
1 pint linseed oil,
1/2 pint of the droppings of sweet oil,
And well mix.

Another early stamp which will well repay attention is the perforated penny red with control letters in the four corners. This specimen bears various plate numbers, from 71 to 225 (Nos. 75, 77,[2] 126, 128 excepted). The collector will do well to seek out a copy of each number and arrange them in numerical order on three or four pages of the album. The distinctive numbers are to be found on either side of the head, hidden among the filigree lines. No. 225, it may be said, is somewhat difficult to obtain, but all the others are fairly common.

[2] Plate No. 77 is supposed to have been rejected as unfit for use. An unused copy, however, figures in the Tapling Collection in the British Museum.