In 1891 Mabel and Ethel were boarding at Elleray Ladies College, Clapham, London.

In 1901 she had two children and a menage of sister, step-sister and half-brother staying with her:

Name Relation Condition Sex Age Birth Year Occupation  Disability  Where Born

ARMSON, Frank G Head Married M 37 1864 Surgeon  Yoxall, Staffordshire
ARMSON, Ethel M Wife Married F 24 1877   Rangemore, Staffordshire
ARMSON, Doris K Daughter F 2 1899   Yoxall, Staffordshire
ARMSON, Frank G A Son M 0 (1 MOS) 1901   Yoxall, Staffordshire
ARDEN, Mabel Sister-In-Law Single F 26 1875   Rangemore, Staffordshire
BODEN, Jessie Step Sister In Law Single F 31 1870   Burton, Staffordshire
BODEN, Noel C Brother-In-Law Single M 16 1885   Burton, Staffordshire
BLACKSHAW, Mary Servant Widow F 46 1855 Nurse (Monthly)   Macclesfield, Cheshire
MYATT, Agnes Servant Single F 27 1874 Cook (Domestic)   Blithbury, Staffordshire
YARNALL, Sarah Servant Single F 23 1878 Nurse (Domestic)   Chasetown, Staffordshire

RG number: RG13 Piece: 2657 Folio: 124 Page: 10    

Registration District: Lichfield Sub District: Rugeley EnumerationDistrict: 10
Ecclesiastical Parish: Yoxall St Peter's

Civil Parish: Yoxall Municipal Borough:
Address: Town Hill, Yoxall
County: Staffordshire
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In 1911 she had had 5 children in all, the youngest aged 2.  Note that she had already lost two children:

Name Relation Condition/
Yrs married Sex Age Birth
Year Occupation Where Born Original
census
image
ARMSON, Frank Greasley Head Married M 47 1864 Surgeon  Staffs Yoxall
ARMSON, Ethel Margaret Wife Married 13 years F 34 1877  Staffs Rangemore
ARMSON, Doris Kate Daughter F 12 1899 Staffs Yoxall
ARMSON, Frank Gerald Arlen Son M 10 1901 School  Staffs Yoxall
ARMSON, Gladys Mollie Daughter F 5 1906 Staffs Yoxall
ARMSON, John Charles Son M 4 1907 Staffs Yoxall
ARMSON, Philip Arsen Son M 2 1909 Staffs Yoxall
HUMPREYS, Alice Servant Single F 18 1893 Nurse Domestic  Oxford Kidlington
SMITH, Ruth Servant Single F 17 1894 Housemaid Domestic  Staffs Yoxall

RG number: RG14 Piece: 16912 Reference: RG14PN16912 RG78PN1045 RD367 SD2 ED22 SN104

Registration District: Lichfield Sub District: Rugeley EnumerationDistrict: 22
Parish: Yoxall

Address: The Moat Yoxall Burton-On-Trent
County: Staffordshire
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This is highly likely her death:

Surname First name(s) Age District Vol Page
Deaths Sep 1935   (>99%)
Armson Ethel M 58 Lichfield 6b 387
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This is her marriage:

Surname First name(s) District Vol Page
Marriages Jun 1897   (>99%)
Arden Ethel Margaret Worksop 7b 90   
Armson Frank Greasley Worksop 7b 90