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1930 U.S. Census, Baltimore City, Maryland
7th Ward, Block 66, Enumeration District 4-81, Sheet 5A
814 North Linwood Avenue
Dwelling 63, Family 68
Davis, Roland M., head, owner, real estate valued at $4,000, owns radio set, male, white, 27, married, age at first marriage 19, not in school, can read and write, born in Virginia, both parents born in Virginia, speaks English, crane operator, excavating, wage worker, at work previous day, not a veteran
Davis, Anna, wife, female, white, 26, married, age at first marriage 26, not in school, can read and write, born in Maryland, both parents born in Maryland, speaks English, no occupation
Davis, Roland J., son, male, white, 8, single, in school, can read and write, born in Maryland, father born in Virginia, mother born in Maryland, speaks English, no occupation
Davis, Loretta M., daughter, female, white, 6, single, in school, can read and write, born in Maryland, father born in Virginia, mother born in Maryland, speaks English, no occupation

1930 Baltimore City Directory, page 395:
Davis Roland M (Anna) crane opr h814 n Linwood av

1937 Baltimore City Directory, page 298:
Davis Roland M (Anna) crane opr h814 n Linwood av

1940 U.S. Census, Baltimore City, Maryland
7th Ward, Enumeration District 4-113, Sheet 61B
814 North Linwood Avenue
Family 215, owned, value $3,000, not on farm
Davis, Roland, head, male, white, 38, married, not in school, highest level of education 7th grade, born in Virginia, living in same house in 1935, at work week of March 24–30, worked 60 hours that week, crane operator for railroad, wage worker, employed 52 weeks in 1939, income in 1939 $2,400, no other sources of income
Davis, Anna, wife, female, white, 37, married, not in school, highest level of education 7th grade, born in Maryland, living in same house in 1935, not at work, not seeking work, engaged in housework, no other sources of income
Davis, Roland Jr., son, male, white, 18, single, not in school, highest level of education 4 years of high school, born in Maryland, living in same house in 1935, at work week of March 24–30, worked 32 hours that week, collector service for newspaper, wage worker, worked 5 weeks in 1939, income in 1939 $75, no other sources of income
Davis, Loretta, daughter, female, white, 16, single, in school, highest level of education 3 years of high school, born in Maryland, living in same house in 1935, not at work, in school, no other sources of income