Catalogue of apparatus and materials required in the practice of photography, including both plate and paper processes : manufactured and sold by George Knight and Sons, philosophical instruments makers, &c., Foster Lane, Cheapside, London : illustrated with woodcuts (1851)
George Knight & Sons, author · London : George Knight and Sons · leaf 22
George Knight & Sons · Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.