Alfred W. Pollard,
An Essay on Colophons, with Specimens and Translations
“ This it is which gives the colophon such extraordinary importance in the history of early printing. Wherever one exists, the question of place and printer, and frequently the question of date, is entirely solved. Where there is no colophon, we are left to conjecture. The problem is, indeed, generally soluble by a really scientific investigation, but it is only of late that science has been thoroughly brought to bear upon it by a Bradshaw and a Proctor. ”
