[Sidenote: Size of Letters.] The size, shape, and length of a scroll must, of course, vary with the position it is intended to occupy. In a text composed entirely of capitals, the size of the letters should be about half the depth of the zinc: the latter being 6 inches, including the border, the capitals would be 3 inches high. Small letters would bear, of course, their usual proportion, as in other illuminations. [Sidenote: Distinctness.] It is quite a mistaken idea that the larger the printing, the plainer will be the text; clearness is rather attained by keeping the letters close to each other, and leaving a sufficient space between each word. It will be found, as a general rule, that, with the exception of the letter I, all capitals are contained in a square--if 3 inches high, 3 wide. It is very useful to bear this in mind in calculating the number of words to be printed in a given space, especially when it is difficult to judge of the effect till complete. Texts for large churches, to be placed round arches, or at any great height, are generally printed in capitals. [Sidenote: Outlines to be traced.] Outlines should not be drawn upon the zinc in the first instance, but upon a strip of paper (which may be several sheets pasted together at the edges), wider than the scroll, so that it may be folded firmly over it, and the letters traced, as already explained (page 7). Any thin common paper answers for this purpose: tissue would be too thin. Tracing is recommended, because the process of erasing pencil-marks, although easily effected with spirits of turpentine, is apt to leave a smear, and spoils the smooth clearness of the foundation-colour. [Sidenote: Chalk-tracing.] On a dark-coloured ground the following method is pursued. Draw the text, as usual, on common cartridge-paper (3 or 4 inches wider than the zinc, so that the edges may be turned down firmly over it): with pointed scissors cut the letters out and put them aside, as they are not required: lay the remaining paper-groundwork on the zinc, and with red or white tailor's pipe-clay trace carefully round the outlines of the spaces which form the letters. When all are traced, remove the paper, and with a handkerchief brush away, _very_ lightly, the superfluous chalk. [Sidenote: Dry Foundation-Colours.] Special care must be taken not to begin the lettering until the foundation-colour be perfectly hardened, otherwise the pressure of the pencil will make indented lines which cannot be removed, should correction be necessary. In cold, damp weather, the paint dries and hardens very slowly, so that the foundations should be prepared at least a week before they are required for illuminating.