Her birth index:

First name(s)         Grace Sybil R
Last name             Studd
Birth quarter         4
Birth year            1887
Mother's maiden name  Maclean
District              Woodbridge
County                Suffolk
Country               England
Volume                4A
Page                  840
Record set            England & Wales Births 1837-2006
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Her baptism transcript:

Source Suffolk Baptism Index (Part 4)
Record                  Suffolk Baptism Index 1538-1911
First name(s)           Grace Sybil Rose
Last name               Studd
Baptism year            1887
County                  Suffolk
Country                 England
Place                   Melton
Mother's first name(s)  Rose Beatrice
Father's first name(s)  Alnod Ernest
Baptism date            07 Dec 1887
Parish                  St Andrew
Father's occupation     Esquire
Residence               Melton
Entry No                305
Category                Birth, Marriage, Death & Parish Records
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In 1910 a Grace Sybil R Studd married one of a Baum,  a Mortimer or a Jones-Mortimer.

So in the 1911 census look for Grace as one of those surnames:  The Baums were not married but the Mortimer were clearly her at 6 Fons George Road Taunton, Wilton, Somerset:

First name(s)  Last name  Relationship  Marital status  Sex  Age  Birth year  Occupation  Birth place
Grace Sybil Rose Jones  Mortimer  Wife      Married  Female  23  1888  Nil                 Melton Suffolk
Rachel Elizabeth Jones  Mortimer  Daughter  Single   Female   1  1910  -                   France Resident
Edith                   Carter    Servant   Single   Female  23  1888  Housemaid Domestic  Tiverton Devon
Edith Gertrude          Cox       Servant   Single   Female  29  1882  Nurse Domestic      Dorchester Dorset

Ref:    1911 ref: RG14PN14242 RG78PN855 RD305 SD3 ED9 SN296
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In 1919 there was a marriage between Grace and Samuel J Marsh, from FreeBMD:

Surname   First name(s)  Spouse   District   Vol  Page
Marriages Jun 1919   (>99%)
Marsh     Samuel J       Studd     St.Martin  1a  1377
Marsh     Samuel J       Mortimer  St.Martin  1a  1377
Mortimer  Grace S R J    Marsh     St.Martin  1a  1377
Studd     Grace S R      Marsh     St.Martin  1a  1377

And FreeBMD included this very helpful ‘Postem’:
06/06/2013 Grace Sybil Rose MARSH nee STUBB (divorced) m: Samuel John MARSH 24 May 1919 at St Geo. Hanover Sq
(Except that they got her name wrong - it was Studd.)

No children found for this second marriage.
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Not found in 1939 register.

No death found.

Their marriage index:

First name(s)     Grace Sybil R
Last name         Studd
Marriage quarter  1
Marriage year     1910
MarriageFinder    Grace Sybil R Studd married one of these people
                  Reinhold Otto Baum, Lambton Allix Mortimer, Lambton Allix Jones-Mortimer
District          St. George Hanover Square
County            London
Country           England
Volume            1A
Page number       888
Record set        England & Wales Marriages 1837-2005
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Their marriage index:

Surname   First name(s)  Spouse   District   Vol  Page
Marriages Jun 1919   (>99%)
Marsh     Samuel J       Studd     St.Martin  1a  1377
Marsh     Samuel J       Mortimer  St.Martin  1a  1377
Mortimer  Grace S R J    Marsh     St.Martin  1a  1377
Studd     Grace S R      Marsh     St.Martin  1a  1377

And FreeBMD included this very helpful ‘Postem’:
06/06/2013 Grace Sybil Rose MARSH nee STUBB (divorced) m: Samuel John MARSH 24 May 1919 at St Geo. Hanover Sq
(Except that they got her name wrong - it was Studd.)
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