"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M858-RJT : accessed 29 April 2016), Louisa Dry in household of Paul Dry, Montgomery county, Montgomery, Illinois, United States; citing family 379, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).