"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MSWQ-2FW : accessed 08 May 2014), Irene Fenn in household of Charles Fenn, Vienna Township, Grundy, Illinois, United States; citing sheet 1A, family 4, NARA microfilm publication T623, FHL microfilm 1240304.
"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MKDH-9KZ : accessed 08 May 2014), Irene Fenn in household of Charles C Fenn, Vienna, Grundy, Illinois, United States; citing enumeration district (ED) 60, sheet 3A, family 62, NARA microfilm publication T624, FHL microfilm 1374303.
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