A tannery was a place that converted the hides of animals into usable products.
In 1006, the Eighth Doctor and Tamsin Drew landed in a tannery adjacent to a monastery in Ireland. There, monks were making fine vellum paper from hides. (AUDIO: The Book of Kells)
As a child in the 19th century, Henry Gordon Jago lived downwind of a tannery. (AUDIO: Jago & Litefoot & Patsy)