Lessons in the art of illuminating : a series of examples selected from works in the British Museum, Lambeth Palace Library, and the South Kensington Museum (1895)
Loftie, W. J. (William John), 1839-1911, author · London ; Glasgow : Blackie & Son · leaf 23
DESCRIPTION OF PLATE I. … which the student will do well not to mark with white paint but to leave out by delicate manipulation. Next the edge of the letter both within and without is followed with a line of red or blue drawn a little way from it and never touching. Then the space so marked within the letter is filled by a…
Illumination of books and manuscripts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.