Apparently divorced on census, 1940.
USA Census, 1920
Name: Helen Martin
Event Place: , Dona Ana, New Mexico
Gender: Female
Age: 7
Marital Status: Single
Race: White
Birthplace: New Mexico
Birth Year (Estimated): 1913
Relationship to Head of Household: Daughter
Household ID: 162
Sheet Number: 9
GS Film number: 1821075
Digital Folder Number: 4313376
Image Number: 01060
Household Gender Age Birthplace
SELF William W Martin M 40y Utah
WIFE Estella Martin F 30y Missouri
SON William Martin M 10y Texas
DAU Helen Martin F 7y New Mexico
USA Census, 1930
Name: Helen G Martin
Event Place: Phoenix, Maricopa, Arizona
Gender: Female
Age: 17
Marital Status: Single
Race: White
Birthplace: New Mexico
Birth Year (Estimated): 1913
Relationship to Head of Household: Daughter
Father's Birthplace: Utah
Mother's Birthplace: Missouri
District: 0028
Household ID: 117
Sheet Number and Letter: 6A
Line Number: 25
Affiliate Publication Number: T626, roll 58
GS Film number: 2339793
Digital Folder Number: 4532416
Image Number: 00344
Household Gender Age Birthplace
Head Elva Studley F 42 Colorado
Lodger Marie Wilson F 25 Oklahoma
Head Stella F Martin F 40 Missouri
Dau Helen G Martin F 17 New Mexico
Niece Betty Jo Studley F 8 Arizona
Lodger Lyda Denning F 45 Ohio
USA Census, 1940
Name: Helen Martin
Event Place: East Helena, School District 9 East Helena, Lewis and Clark, Montana
Gender: Female
Age: 27
Marital Status: Divorced
Race: White
Relationship to Head of Household: Stepdaughter
Birthplace: New Mexico
Birth Year (Estimated): 1913
Last Place of Residence: Phoenix, Maricopa, Arizona
District: 25-24
Family Number: 170
Sheet Number and Letter: 9A
Line Number: 4
Affiliate Publication Number: T627
Affiliate Film Number: 2222
Digital Folder Number: 005461690
Image Number: 00981
Household Gender Age Birthplace
Head Alfred E Griffith M 57 England
Wife Stella Griffith F 50 Missouri
Stepdau Helen Martin F 27 New Mexico
Step-granddau Nancy Ann Shartzer F 8 Arizona
Lodger Bernard Poepping M 46 North Dakota