Etruscan Flint Mill pen drawing by Neville Malkin July 1975 . Etruria Industrial Museum, Lower Bedford Street, Etruria photo: May 2008 The Etruscan Mill was built in 1857 alongside the Trent and Mersey Canal. The Mill's purpose was to grind materials for the agricultural and pottery industries, such as tle bone and flint. Bone meal was used by farmers as a fertiliser. Ground, burnt bone ...