His wife Mary is listed as a widow in the 1865 NY State census.
Sources
"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MCYZ-3HT : 9 November 2014), A S Sprague, Buffalo, ward 5, Erie, New York, United States; citing family 126, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
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