Will give you what I've found on the 1901 family, in case you want to follow them up~
1891
9 Egbert Street, St Pancras
RG12/118/206/35
William Smith, 31, gardener, b. Slough
Eva, w, 28, b. Cullompton
Eva A, d, 4, b. Hampstead
Jessie E, d, 2, b. -do-
(have children's baptisms if required - lived Gospel Oak Grove and then Egbert Street )
1881
Market Garden House, Beeches Road, Farnham Royal, Eton, Bucks
RG11/1461/111/13
James Smith, 46, market gardener (N D), b. East Burnham
Emma, w, 46. b. Slough
Caroline Adams, d, m, 23, groom's wife, b. Slough
Charles Thos Adams, s in l, 24, groom (dom), b. -do-
William Smith, s, 21, labourer (gen), b. -do-
Arthur, s, 9, b. Farnham Royal
Clara, d, 7, b. -do-
Alfred, s, 1, b. -do-
1871
Green Lane, Farnham Royal
RG10/1402/88/19
James Smith, 35, market gardener, b. East Burnham
Emma, w, 34
Caroline, d, 13
William, s, 11
James, s, 10
Harry, s, 9
Lizzey, d, 6
Hannah, d, 4
Charles T, s, 2
All except James b. Slough
Also there:
Robert Wheeler, lodger, unm, 24, Carter & labourer, b. Farnham Royal
Alice Wheeler, sister (? of Robert), unm, 20, domestic servant, b. -do-
An outside possible for Eva (no marriage found so far ):
1881
Old Park Farm, Cheshunt, Herts
RG11/1398/53/4
E Ayre, wife, 30, farmer's wife, b. Devon, Templeton
Richard S. V. Ayre, s, 4, b. Devon, Witheridge
Eva M Coleman, servant,18, general servant- domestic, b. Devon, Cullompton
James Kingdom, serv,22, carter emplyed on farm, b. Devon Witheridge
Joseph Trussell, serv, 33, cowman employed on farm, b. -do-
gnu