1930: living on Lincoln Street in Boston with wife Margaret and daughter Ethel. Age 19, married at age 17. Occupation: automobile helper.
1940: living on Baldwin Street in Boston, Suffolk Co., Massachusetts. Age 29. Lived in same place in 1935. Working as a chauffeur for a wholesale/retail coal & fuel distributor. Listed as Robert J. 
↑ "United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XQ5P-KKS : accessed 27 May 2014), Robert Davidson, Boston (Districts 1-250), Suffolk, Massachusetts, United States; citing enumeration district (ED) 0059, sheet 2A, family 34, NARA microfilm publication T626, roll 943.
↑ "United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K4JX-RQM : accessed 27 May 2014), Robert J Davidson, Ward 2, Boston, Boston City, Suffolk, Massachusetts, United States; citing enumeration district (ED) 15-76, sheet 4B, family 89, NARA digital publication of T627, roll 1659.