For those trying to help;
1851 Census
Abbey Street,
Derby St Werburgh, Derbyshire
HO107/2143/612/21
William Harper, 28, Head, Mar, Book Binder, Derby, Derbyshire
Jane Harper, 28, Wife, Mar, born Ashby De La Zouch, Leicestershire
Sarah A Harper 3
Elizabeth Harper, 2
Mary Harper, 7 (should be 1)
1861;
William Harper, 38
Jane Harper, 38
Sarah Ann Harper, 13
Elizabeth Jane Harper, 12
Mary Harper, 10
1871 they are in Leeds, Yorkshire
Jane Harper, 1
William Harper, 4