Hi Pat
For reference then, this is the 1881 Census
1881 - where Rachel Sarah REEVES nee ROWE is now wih her REEVES husband & children in Hamlet, London:Head: James REEVES age 35 (YOB1846) Deptford, Kent,
Wife: Rachel REEVES age 32 (YOB 1849) Wigbrough, Essex,
Dau: Rachel REEVES age 13 (YOB 1868) Woolwich, Kent, England
Son: Henry REEVES age 6 (YOB 1875)Mile End, Middlesex, England
Dau: Emily REEVES age 4 (YOB 1877)Old Ford, Middlesex, England
Rachel Sarah REEVES (the daughter above in 1881) married not WEBSTER, but
Henry JACOBS in Dec Qtr 1889 WEst Ham. I know this because in the 1891 Census - Rachel JACOBS has lately given birth to her first child and her own mother Rachel S REEVE is in attendance

Here is the 1891 & 1901 Census for the new JACOBS family:
1891 - St Andrew and St George, Holborn, LondonEcclesiastical parish: St George the Martyr
Ref: : RG12/218, Folio 102, page 19
Registration district: Holborn
35 Earl Street (a tenement)Head: Henry JACOBS age 23, Bookbinder, b Bethnal Green, London
Wife: Rachael S. JACOBS age 23, b Woolwich, London
Dau: Violet R JACOBS age 1 month. b Bloomsbury London
Relative: Rachael S REEVE age 42, b Salcott Essex
Note: Ancestry have transcribed the Relative as "Rachel G RACER" making her a bit hard to find on her own account! but if one looks at the image it is actually looks like "Rachael S REECE" however, on magnification, the surname "C" is a closed & squeezed up "V". I have no doubt this is your family. Ancestry have also transcribed Violet's birthplace as "Polooarsbury" so they weren't having a good day
.
Son-In-Law Henry may have provided the information for the Census and was a bit out on his mother-in-law's place of birth. And here is the next little surprise - in 1901 Rachel & Henry JACOBS are actually living in the same houshold as her her father James REEVES and her sisters Emily & Eleanor whom Valda already found!
1901 - Walthamstow, Essex Ecclesiastical parish: St Michael and All Angels
RD: West Ham, Ref: : RG13/1633 , Folio 78, page 6
Registration district: West Ham
Oxford Villa 60 Blackhorse Road//
Head: James REEVES Widower, 52, b Deptford, Kent, Commercial Traveller
Dau: Emily REEVES single, 24, b Old Ford, London
Dau: Elenor REEVES single, 19, b Mile End, London
/
Head: Henry JACOBS, 33, Miscalleaneou Bookbinder (worker) b Bethnal G, London
Wife: Rachel JACOBS, 32, b Woolwich Kent
Dau: Violet R JACOBS, 10, b Bloomsbury London
Son: Henry J JACOBS, 3, b Walthamstow Essex
//
// denotes beiginning and end of the dwelling house at Nr 60.
/ denotes the seperation of the "households" within the dwelling.This now leaves to find:1891 Census: children of Rachel S REEVES nee ROWE & James REEVES who are not with either parent in that Census.
Son Henry REEVES b 1875 (Mile End London per 1881 OR Southend Essex per 1901)
Dau: Emily REEVES b 1877 (Old Ford London per 1881 and 1901)
Dau Eleanor REEVES b 1882 (Mile End London per 1901)
(*and are we thinking son James b 1871 may have died before 1881?)Cheers
AMBLY