Henry was born about 1889.
"United States World War I Draft Registration Cards, 1917-1918", database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KXY2-5ZL : 26 December 2021), Henry J Mauer, 1917-1918. Clerk, United Cigar Store Co. Medium height, slender, brown eyes and hair.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X7XD-ZZS : accessed 2 January 2022), Henry Mauer, Brooklyn (Districts 0751-1000), Kings, New York, United States; citing enumeration district (ED) ED 995, sheet 7B, line 82, family 160, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1500; FHL microfilm 2,341,235. Clerk, factory.
"United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KW8R-G2Q : 9 January 2021), Henry J Mauer, Toledo, Lucas, Ohio, United States; citing enumeration district (ED) 95-83, sheet 4A, line 36, family 101, 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 3259.
"United States World War II Draft Registration Cards, 1942," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X5W1-JMZ : 10 March 2021), Henry John Mauer, 1942; citing NARA microfilm publication M1936, M1937, M1939, M1951, M1962, M1964, M1986, M2090, and M2097 (Washington D.C.: National Archives and Records Administration, n.d.).
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