1 1911 census of England, Derbyshire, 4 Raglan Street, Alfreton, Charley Duffield; digital images, Find My Past, Find My Past (www.findmypast.co.uk : accessed 2 Nov 2010); citing RG 78 PN 1252, RG 14 PN 20991, registration district (RD) 436, sub district (SD) 5, enumeration district (ED) 3, schedule number (SN) 198. Cit. Date: 2 Nov 2010.