Boston Ward 23, Suffolk, Massachusetts, United States
Joseph F Cox Head M 40 Canada
Jennie Cox Wife F 42 Canada
Joseph A Cox Son M 14 Massachusetts
William A Cox Son M 12 Massachusetts
Mary M Cox Daughter F 10 Massachusetts
Dorothy Cox Daughter F 7 Connecticut
Laura Cox Daughter F 5 Connecticut
1930 USA Census
Boston (Districts 580-690), Suffolk, Massachusetts, United States
Joseph F Cox Head M 50 Canada
Jane A Cox Wife F 52 Canada
William A Cox Son M 22 Massachusetts
Mary M Cox Daughter F 20 Massachusetts
Dorothy E Cox Daughter F 18 Connecticut
Laura M Cox Daughter F 15 Connecticut
Merle J Granger Lodger M 24 Massachusetts
1940 USA Census
Ward 5, Boston, Boston City, Suffolk, Massachusetts, United States
Joseph F Cox Head M 60 Canada
Jennie Cox Wife F 63 Canada
Mary M Cox Daughter F 30 Massachusetts
Dorothy E Cox Daughter F 28 Connecticut
Bibeans Mcclellen Sister-in-law F 60 Canada
Sources
"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MF97-2W7 : accessed 8 February 2015), Mary M Cox in household of Joseph F Cox, Boston Ward 23, Suffolk, Massachusetts, United States; citing sheet 19B, family 344, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,740.
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XQRK-S2W : accessed 8 February 2015), Mary M Cox in household of Joseph F Cox, Boston (Districts 580-690), Suffolk, Massachusetts, United States; citing enumeration district (ED) 0687, sheet 1A, family 8, line 36, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 957; FHL microfilm 2,340,692.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K4JK-6FD : accessed 27 November 2017), Mary M Cox in household of Joseph F Cox, Ward 5, Boston, Boston City, Suffolk, Massachusetts, United States; citing enumeration district (ED) 15-198, sheet 6A, line 24, family 178, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 1663.
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