She was a twin with Florence.

In 1881:

Name Relation Condition Sex Age Birth Year Occupation  Disability  Where Born

CHAMBERLAIN, Arthur Head Married M 38 1843 Master Cabinet Brassfounder Manufacturer Of Gas/ Water Fitting Lamps  London Camberwell Near, London, Middlesex
CHAMBERLAIN, Louisa Wife Married F 33 1848   Edgbaston Birmingham, Worcestershire
CHAMBERLAIN, Margaret Daughter Single F 10 1871 Scholar  Edgbaston Birmingham, Worcestershire
CHAMBERLAIN, Helen Daughter Single F 9 1872 Scholar  Edgbaston Birmingham, Worcestershire
CHAMBERLAIN, Katharine Daughter Single F 7 1874 Scholar  Edgbaston Birmingham, Worcestershire
CHAMBERLAIN, Bertha Daughter Single F 6 1875 Scholar  Edgbaston Birmingham, Worcestershire
CHAMBERLAIN, Mary Daughter Single F 4 1877 Scholar  Moor Green Kings Norton
CHAMBERLAIN, Ruth Daughter Single F 3 1878 Scholar  Moor Green Kings Norton
CHAMBERLAIN, Charlotte Daughter Single F 2 1879 Scholar  Moor Green Kings Norton
CHAMBERLAIN, Arthur Son Single M 1 1880 Scholar  Moor Green Kings Norton
LESLIE, Bertha Governess Single F 21 1860 (T) Governess (Private)  Ashton on Mersey, Lancashire
ELTON, Edward Servant Widower M 54 1827 Coachman (Dom)  Ludlow, Shropshire
HUGHES, Thomas Servant Single M 18 1863 Groom (Dom)  Kempsey, Worcestershire
BIGGS, Hannah Servant Single F 36 1845 Cook (Dom)  Stokesay, Worcestershire
WILLIAMS, Fanny Servant Single F 27 1854 Parlour Maid (Dom)  Dilwyn, Herefordshire
PRICE, Sarah Sophia Servant Single F 20 1861 Domestic Servant  Kings Norton, Worcestershire
RADFORD, Ellen Servant Single F 26 1855 Domestic Servant  Saltley, Warwickshire
MEADOWS, Mary Ann Servant Single F 23 1858 Domestic Servant  Bishoptown, Dorset
ROBERTS, Sarah Jane Servant Single F 29 1852 Domestic Servant  Birmingham, Warwickshire
ROWSELL, Emily Servant Single F 38 1843 Domestic Servant  Bridport, Dorset
THOMPSON, Clara Servant Single F 21 1860 Domestic Servant  Birmingham, Warwickshire
MATTHEWS, Martha Servant Single F 49 1832 Domestic Servant  Chungunford, Worcestershire

RG number: RG11 Piece: 2947 Folio: 32 Page: 6    

Registration District: Kings Norton Sub District: Kings Norton
EnumerationDistrict:   Ecclesiastical Parish:

Civil Parish: Kings Norton Municipal Borough:
Address: Moor Green Hall, Kings Norton
County: Worcestershire
______________

In 1991 there was one last son, John:

Name Relation Condition Sex Age Birth Year Occupation  Disability  Where Born

CHAMBERLAIN, John Son M 9 1882 Scholar  Kings Norton, Worcestershire

RG number: RG12 Piece: 2350 Folio: 101 Page: 19

Of the other children, Kathereine was missing, possibly on her medical studies and Mary also was not there.  I could find neither elsewhere on the census.

Their marriage:

Surname First name(s) District Vol Page
Marriages Jun 1870   (>99%)
CHAMBERLAIN Arthur Birmingham 6d 252   
Kenrick Louisa Birmingham 6d 252