welcome Edna.
How about this lad as your Grandfather? Looking at a map, Elvetham is just SE of Hartley Wintney itself.
HW was also a big Registration District.
1871 census RG10; Piece: 1233; Folio: 5; Page: 1 Town of Hartley Wintney
enumerated on the same page as the White Lion PH at Hartford Bridge, which I suspect is on today's A30, just north of Elvetham.
Willm Harwood 41 Head of Household born Elvetham: an Agricultural Labourer
Martha Harwood 45 Wife born Frimley, Surrey
John Harwood 14 son born Farnham, Surrey
George Harwood 13 son born Elvetham
Jane Harwood 12 dau ditto
Edward Harwood 9 son Hartley Wintney
Elizabeth Harwood 7 dau ditto
Charles Harwood 5 son ditto
Henry Harwood 3 son ditto
Edward's parents marriage:-
Marriages Mar 1854
HARWOOD William Farnham 2a 71
SMITH Martha Farnham 2a 71
Jumping back to 1851 HO107; Piece: 1680; Folio: 284; Page: 1 Elvetham, Hartley Wintney District, we see Edward's Grandparents:-
all state that born in Elvetham
Chs (Charles) Harwood 47 Head of Household Agricultural Labourer
Hannah Harwood 40 Wife
Charles Harwood 22/7? son
William Harwood 20 son
Jane Harwood 13 dau
Elizabeth Harwood 10 dau
Edward Harwood 7 son
Mary Ann Harwood 5 dau
John Harwood 3 son
As their marriage would seem to be pre-1837, I dont have access to the resources needed to research it in a Parish Register