I think I've found Frederick's niece, Cora...
1901 Deptford St Paul, London
RG 13/530 folio 178 page 49
32 Haydock Road
Henry Lindley, head, 25, printer lithographic, Bradford York
Cora, wife, 26, Chatham Kent
Harry, son, 2, Camberwell London
Edward, son, 10mo, Deptford London