'Powder-Mills', 1872. Gunpowder mill on the Brandywine Creek, Delaware, USA. The Eleutherian Mills, used for the manufacture of explosives, were founded by the Du Pont family in the early 19th century. From "Picturesque America; or, The Land We Live In, A Delineation by Pen and Pencil of the Mountains, Rivers, Lakes...with Illustrations on Steel and Wood by Eminent American Artists" Vol. I, edited by William Cullen Bryant. [D. Appleton and Company, New York, 1872]