couldnt immediately see Robt in 1841 in the Newton Abbott (Denbury's RD) district, but here they are in 1851 - recently married perhaps based on childs age ?
HO107/1871; Folio: 453; Page: 12 - Denbury
Higher Street
Robert Grant 37 Head Labourer Devon, Denbury
Jane Grant 24 Wife Devon, Staverton
Elizabeth Grant 1 dau Denbury