Extract from the 1900 Census:
Name: Helen C Tennant
Age at last birthday: 6
Date of birth: Jul 1893
Birthplace: Michigan
Race: white
Sex: female
Relationship to head-of-house: daughter
Home in 1900: Mount Clemens Ward 1, Macomb, Michigan
Address: 40 South Gratiot Street
Marital status: single
Father's birthplace: Michigan [sic]
Mother's birthplace: Michigan
Occupation: none
Siblings living at home: Mabelle (age 18) and Robert H (9)
Census place: Mount Clemens Ward 1, Macomb, Michigan; Roll: T623 727; Page: 19A; Enumeration District: 60
Date: 18 Jun 1900

Extract from the 1910 Census:
Name: Helen Tennant
Age in 1910: 16
Estimated birth year: 1894
Birthplace: Michigan
Race: white
Sex: female
Relationship to head of family: daughter
Parent: Ada M Tennant, age 52
Home in 1910: Mount Clemens Ward 1, Macomb, Michigan
Address: 80 Church Street
Marital status: single
Able to speak English: yes
Able to read and write: yes
Father's birthplace: Canada
Mother's birthplace: Michigan
Occupation: attending school
Sibling living at home: Robert (age 19)
Census place: Mount Clemens Ward 1, Macomb, Michigan; Roll: T624_659; Page: 4B; Enumeration District: 70; Image: 173
Date: 18 Apr 1910

Extract from the 1920 Census:
Name: Helen F Marlatt
Age: 26
Estimated birth year: 1894
Birthplace: Michigan
Race: white
Sex: female
Relationship to head of house: wife
Home in 1920: Mount Clemens, Macomb, Michigan
Address: 106 Clinton Street
Marital status: married
Able to speak English: yes
Able to read and write: yes
Father's birthplace: Canada English
Mother's birthplace: Michigan
Occupation: none
Census place: Mount Clemens Ward 2, Macomb, Michigan; Roll: T625_782; Page: 4B; Enumeration District: 76; Image: 758
Date: 6 Jan 1920

Extract from the 1930 Census:
Name: Helen T Marlatt
Age: 36
Estimated birth year: 1894
Birthplace: Michigan
Race: white
Sex: female
Relation to head-of-house: wife
Home in 1930: Mount Clemens, Macomb, Michigan
Address: 68 Scott Boulevard
Marital status: married
Age at first marriage: 23
Education: able to speak English
Education: able to read and write
Father's birthplace: Canada English
Mother's birthplace: Michigan
Occupation: none
Census place: Mount Clemens, Macomb, Michigan; Roll: 1009; Page: ; Enumeration District: 33; Image: 405.0
Date: 1 May 1930

Extract from Clinton Grove Cemetery in Mount Clemens, Macomb, Michigan:
Name: Helen Tennant Marlatt
Age: 40
Sex: female
Date of burial: 9 Jan 1934

Children:
(1) William Tennant Marlatt
(2) Mary Helen Marlatt
(3) Richard Howard Marlatt.