The Complete Nonsense of Edward Lear.

Until the 1920s, the actual drawing of the image on the stone was done by professionals in the printing works, who would then translate the design brought in by a freelance artist. The Curwen Press, through agreements by the trade unions, made it possible for their artists to draw directly on to the stone at the works. Freedman, who liked to scrape away solid areas of his chalked drawing on the stone, was one artist to benefit from this move.