Alum works; Men quarrying at an alum works.Image taken from The Costume of Yorkshire; illustrated by a series of forty engravings; being facsimiles of original drawings [by G. Walker]; with descriptions in English and French. (Costumes du comt: e d: York; etc.) [Edited by Edward Hailstone.] Originally published / produced in Richard Jackson: Leeds; 1885.Richard Jackson: Leeds; 1885.From: The Costume of Yorkshire; illustrated by a series.1756. c. 7; London; British Library.