Butterley Company and subsidiaries: unlisted records Accession of Mar 2014: Plan of Butterley Company works 1857; Plan of locomotive 1889 Accession of Sep 2015: Publications, guides, photographs and negatives, plans, histories, of site at Ripley and other non-Derbyshire sites operated by Butterley Brick Ltd., c1968-c1987 Accession of Oct 2015: Engineering drawings rescued from the derelict works of the Butterley Company, c1949-c1990 20th cent