Fellmonger

Fellmonger = dealer in animal hides or skins, especially sheepskins, who prepared the skins for sale. Skinned pelts were trimmed, washed, dipped in lime pits, and then the hair, fur, or skin-wool (distinct from shorn fleece-wool) were removed. At the tannery they were often split into three parts: parchment, leather; chamois leather.

https://en.wikipedia.org/wiki/Fellmonger .

Long description of associated processes here. The Bourne Archive is a thirty-eight page booklet presented with the compliments of T.W. Mays and Son, of Bourne. It is un-dated but internal evidence indicates that it comes from shortly after 1905, and before 1909.