England Select Births and Christenings
Baptism April 1 1825 Mary Sudbury, parents Samuel and Mary Sudbury, father is a farmer, Egmanton, Nottinghamshire

Possible entry in the 1841 census Grantham, Sudbrooke, Lincolnshire
Mary Sudbury, age 15, female servant, not born in Lincolnshire
She is living with the William Ward, a farmer, and his family and 3 other servants.

In the April to June 1843 marriage index John Wright Whitehead and Mary Sudbury, Southwell district, Nottinghamshire, volume 15, page 8732

In the 1851 census 24 Monmouth Street, Eccleshall Bierlow, Sheffield, Yorkshire
Head John Whitehead, married, age 27, Policeman, born Nottingham
Wife Mary Whitehead, age 26, born Egmanton
Son Edward Whitehead, age 6, scholar, born Egmanton
Son Samuel Whitehead, age 4, scholar, born Egmanton
Son Thomas Whitehead, age 1, at home, born Egmanton
2 families of boarders for a total of 6 people
Brother in Law Samuel Sudbury, unmarried, age 21, miller, born Egmanton, Nottinghamshire

New Orleans US Passenger Lists
Departed Liverpool, England, on the Golconda, arrived March 26 1853, New Orleans
George W. Whitehead, age 28, farmer
Mary Whitehead, age 27
Edward Whitehead, age 7
Samuel J. Whitehead, age 5
Richard S. Whitehead, age 1
Samuel J. Sudbury, age 28, miller
Emma Sudbury, age 20
[Samuel J. Sudbury and Mary Whitehead are siblings]
[Are John Whitehead and George W. Whitehead the same person?]

Utah, Mormon Overland Travel Records
Mary Sudbury Whitehead
Birth Date 30 Mar 1825
Record Type Arrival
Departure Date 17 Jun 1853
Arrival Date 10 Oct 1853
Arrival Place Deseret, United States
Death Date 30 Oct 1881
Business Name Joseph W. Young Company

1860 US Census
St. Joseph, Buchanan, Missouri
John Whitehead, age 34, labourer, born England
Mary Whitehead, age 33, born England
Edward Whitehead, age 14, born England
S. G. Whitehead, age 12, male, born England
R. S. Whitehead, age 9, male, born England
W. T. Whitehead, age 6, male, born England
L Whitehead, age 4, male, born Utah
Mary Whitehead, age 1 1/2, female, born Utah

1870 US Census
ST. Joseph Ward 4, Buchanan, Missouri
W. J. V? Whitehead, age 46, carpenter, value of real estate $5000, value of personal estate $500, born England
Mary Whitehead, age 45, keeps house, born England
Richard Whitehead, age 18, at home, born England
Leo Whitehead, age 11, at home born Utah Territory
4 others probably boarders

1880 US Census
96 Cemetery Street, Saint Joseph, Missouri
Head John Whitehead, age 56, house mover, born England
Wife Mary Whitehead, keeping home, born England
Son Richard Whitehead, age 28, moves houses, born England
Son Leo Whitehead, age 22, pattern maker in foundry, born Utah Territory

Utah Death Records
Salt Lake, Ward 18
Mary Whitehead born March 30 1825, Egmanton, Nottinghamshire, daughter of Samuel and Mary Sudbury, died October 30, 1881, effects of injuries thrown from wagon,, Dr Douglas, burial plat. 16?, block 3 lot 3 South

Salt Lake City Cemetery Records
Mary Whitehead, born March 30 1825, Egmanton, England, died October 30, 1881, buried October 30, 1881, pl

Millenium File
Mary Sudbury, born March 30, 1825, Egmanton, Nottinghamshire
Father Samuel Sudbury, mother Mary Wardell
Spouse John Wright Whitehead
Children Leo Seth Whitehead
Died October 30 1881, Salt Lake City, Utah

From a newspaper article, no newspaper name or date given
[It is quite blurry and a challenge to decipher]
Fatal Accident
Mrs. Mary Whitehead is thrown out of a wagon and dies in six hours
At four o’clock yesterday afternoon Mrs. Mary Whitehead her son Leo Whitehead, Miss Bradbury? and a little three-year old boy of Bro. Samuel J. Sudbury [both a Brother and her brother] were riding in a wagon on the way to the residence of Brother Samuel Sudbury Jr. [her nephew]in the 11th Ward ??????. When in that vicinity the horse, which was going at a rather rapid pace, suddenly????? ?? ??? ????, upsetting the vehicle and throwing all of the occupants violently to the ground. All escaped injury except Mrs. Whitehead, who was very badly hurt. She was taken to the house of Brother S. Sudbury Jr. and surgical aid procured, when it was discovered that the left arm was broken within an inch or two of the shoulder, besides sustaining very serious injuries to the lower part of the body.
… she expired about 10 o’clock last night about 6 hours after the accident . . .
Mrs. Whitehead was the sister of Bro. Samuel J. Sudbury, of the Empire Mill, with whom she resided, was a native of Egmanton, Nottinghamshire, England was 55 years old, and a member of the Church.

Findagrave.com
Mary Whitehead
Birth 30 Mar 1825, England
Death 30 Oct 1881 (aged 56), Salt Lake City, Salt Lake County, Utah, USA
Burial Salt Lake City Cemetery
Salt Lake City, Salt Lake County, Utah, USA
Plot H_3_3_3W
Memorial ID 147624417

England Select Births and Christenings
Baptism March 14 1824 John Wright Whitehead, parents George and Charlotte Whitehead, Retford, Nottinghamshire

1841 England and Wales Census
Egmanton, Kneesal, Earring, Nottinghamshire
Mary Cook, age 65, publican, born Nottinghamshire
Hannah Merrill?, age 20 female servant, born in Nottinghamshire
John Wright Whitehead, age 15, agricultural labourer, born in Nottinghamshire

1900 US Census
Buchanan County Poor Farm, Washington Township, Buchanan County, Missouri
John V. Whitehead, born February 1824, age 76, divorced, born England, immigrated 1853, years in US 43
[Did he and Mary divorce after the 1880 census but before she died in 1881 and he did not know she died? Or Did he remarry then divorce?]