Her birth registration:

Surname   First name(s)      District   Vol  Page
Births Sep 1853   (>99%)
BARTHOLOMEW Jane Mildenhall 4a 395
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In 1871 at 17 she was a Domestic servant on a farm of 250 acres in Harleston, Suffolk.
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She could have married any of these, I have no idea which:

Surname   First name(s)      District   Vol  Page
Marriages Mar 1871   (>99%)
Bartholomew Jane Rachel St Olave 1d 186
Marriages Jun 1873   (>99%)
Bartholomew Jane    Farnham 2a 164
Bartholomew Jane    Farnham 2a 168
Marriages Sep 1874   (>99%)
Bartholomew Jane    Lincoln 7a 767
Marriages Sep 1878   (>99%)
Bartholomew Jane Maria    St. Giles 1b 939
Marriages Sep 1879   (>99%)
Bartholomew Jane Elizabeth    Newport Pagnell  3a  755
Marriages Mar 1880   (>99%)
Bartholomew Jane    Samford 4a 849
Marriages Dec 1881   (>99%)
Bartholomew Jane    Tenterden 2a 1260
Marriages Sep 1882   (>99%)
Bartholomew Jane    Bethnal Green 1c 414
Marriages Sep 1885   (>99%)
Bartholomew Jane    Hartley Wintney 2c 303
Marriages Mar 1889   (>99%)
Bartholomew Jane    Barnsley 9c 207
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If she married in Samford, being in Suffolk, this was to William Howlett and this gave in the 1881 census:

Surname  Forename  Age  Relation  Occupation  Birth Place  

Howlett William 28 Head General Labourer Brantham, -
Howlett Jane 29 Wife White Colne, Essex
Howlett John W 7 M Son Brantham, -

Address: Cattawade Street
Parish: Brantham
Registration District: Samford

But I think this Jane, born in White Colne, Essex is a different Bartholomew family.
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But in 1881 this is her, married to George Love, confirmed by the later presence of her brother Jeremiah in 1891:

Surname  Forename  Age  Relation  Occupation  Birth Place

Love George 26 Head General Laborer  Higham, Suffolk
Love Jane 27 Wife Kentford, Suffolk
Love Ellen 6 Daughter Scholar Lincolnshire
Love Eliza J 4 Daughter Scholar Lincolnshire
Love Albert 4M Son Lincolnshire

Ref: RG11/3241/F?

Address: 30 Nicholas Street
Parish: Lincoln St. Nicholas
Registration District: Lincoln
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In 1891 she had 3 more children and 1, Ellen, had disappearred from the house; additionally her brother Jeremiah with her:

Surname  Forename  Age  Relation  Occupation  Birth Place

Love George 37 Head Malster Higham, Suffolk
Love Jane 38 Wife Henstead, Suffolk
Love Eliza 14 Daughter Scholar Lincolnshire
Love Albert 10 Son Scholar Lincolnshire
Love Frank 9 Son Scholar Lincolnshire
Love Lily 6 Daughter Scholar Lincolnshire
Love Edith 2 Daughter Lincolnshire
Bartholomew Jeremiah 26 Lodger Malster  Henstead, Suffolk

Ref: RG12/2591/F?

Address: 33 Chelmsford Street
Registration District: Lincoln
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In 1901 she had a final child and one more, Eliza, had disappeared:

Surname  Forename  Age  Relation  Occupation  Birth Place

Love William G 46 Head Maltster Kentford, Suffolk
Love Jane 47 Wife Lincolnshire
Love Albert 20 Son  Labourer In Iron Foundry Lincolnshire
Love Frank 18 Son Railway Porter Lincolnshire
Love Lily 16 Daughter Lincolnshire
Love Edith 13 Daughter Lincolnshire
Love Ernest 8 Son Lincolnshire

Ref: RG13/3060/~F189

Address: 33 Chelmsford Street
Parish: Lincoln St. Peter At Gowts
Registration District: Lincoln
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In 1911 she reported that she had had 9 children of which 7 were alive with 2 dying and she been married for 37 years.

The total children shown in the censuses was:

Ellen b. c.Feb 1875
Eliza Jane b. c.Aug 1876
Albert b. Dec 1880 (3m old at ‘81 census)
Frank b. c.Feb 1883
Lily b. c.May 1885
Edith b. c.Nov 1887
Ernest b. c.May 1892

Albert, Frank, Lily, Edith and Ernest were at home in 1901.

So there are two children who never appeared in a census and were born and died between censuses.  The births in Lincoln town from 1875 to 1895 were:

Surname   First name(s)      District   Vol  Page
Births Mar 1875   (>99%)
Love Ellen Lincoln 7a 492              <---
Births Sep 1876   (>99%)
Love Eliza Jane    Lincoln 7a 533          <---
Births Jun 1878   (>99%)
Love John William    Lincoln 7a 571
Births Dec 1879   (>99%)
Love Elizabeth Mansford    Lincoln 7a 511
Births Dec 1880   (>99%)
LOVE Albert    Lincoln 7a 507              <---
Births Sep 1882   (>99%)
LOVE William Allen    Lincoln 7a 540
Births Mar 1883   (>99%)
LOVE Frank    Lincoln 7a 546              ????
Births Jun 1885   (>99%)
Love Lily    Lincoln 7a 515              <---
Births Dec 1885   (>99%)
Love Frank    Lincoln 7a 533              <---
Births Dec 1887   (>99%)
Love Edith    Lincoln 7a 529              <---
Births Jun 1890   (>99%)
Love James    Lincoln 7a 513              <---
Births Jun 1892   (>99%)
Love Ernest    Lincoln 7a 548              <---

Their known children have markers on the right.

Can the unknown of these children be found at other homes in Lincoln censuses?

The first search, in the 1881 census shows neither of John William or Elizabeth Mansford.

The second search, for William Allen or the first Frank shows (a) no sign of William Allen and that it was the first Frank that survived in Jane’s family, so the second Frank belonged to another family, also unseen in Lincoln.

The only death recorded for a recognisable child in Lincoln city was a Frank:
  Deaths Sep 1909   (>99%)
  LOVE Frank 33 Lincoln 7a 256
But this looks like the elder Frank in the above births list, so is probably not Jane’s son.

So I can’t find Jane’s other two children, short of getting certificates for the above.
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Her death:

Surname   First name(s)   Age   District   Vol  Page
Deaths Mar 1939   (>99%)
Love Jane 85 Lincoln 7a 633
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Their marriage registration:

Surname   First name(s)      District   Vol  Page
Marriages Sep 1874   (>99%)
Bartholomew Jane Lincoln 7a 767
Love George    Lincoln 7a 767
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