"New Hampshire, Marriage Records, 1637-1947," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FLDL-8NL : accessed 14 January 2015), Jonathain Knowles and Amanda Collard, 29 May 1848; citing Nashville, , New Hampshire, Bureau of Vital Records and Health Statistics, Concord; FHL microfilm 1,001,275.
"United States Census, 1850," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MD9G-3HV : accessed 14 January 2015), Jonathan Jr Knowls in household of Jonathan Knowls, Andover, Essex, Massachusetts, United States; citing family 428, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.)
"United States Census, 1860," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MZCC-132 : accessed 14 January 2015), Jonathan Knowles, Andover, Essex, Massachusetts, United States; from "1860 U.S. Federal Census - Population," Fold3.com; citing p. 106, household ID 825, NARA microfilm publication M653, National Archives and Records Administration, Washington, D.C.; FHL microfilm 803,496.
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