"United States Census, 1860," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZC8-M8K : accessed 3 July 2015), Sarah Forbes in household of Calvin K Brown, Marblehead, Essex, Massachusetts, United States; from "1860 U.S. Federal Census - Population," database, Fold3.com (http://www.fold3.com : n.d.); citing p. 106, household ID 945, NARA microfilm publication M653 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 803,496.