Familysearch has a different death date, 1882 instead of 1896, but the sources seem right.
Sources
Richard W. Field, “The FIELD and SPARKS Family History (The CARR Room),” was at website "hometown.aol.com/rfield/index.html" ALSO website "member.aol.com/rfield/carrroom.html", 1 Jun 1998. But those websites are now gone. See the saved website image of this document on Thomas Carr b1755 d1822. Carr-3317
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHMJ-766 : 7 September 2017), Nancy Carr in household of Thomas J Carr, Oregon, Clark, Indiana, United States; citing enumeration district ED 32, sheet 218A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,269.
"Indiana Marriages, 1811-2007," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:27JJ-1Z6 : 10 February 2018), Thomas J Carr and Nancy Telford, 19 Nov 1835; citing Washington, Indiana, United States, Marriage Registration, Indiana Commission on Public Records, Indianapolis; FHL microfilm 004265431.
Find a Grave, database and images (accessed 29 July 2020), memorial page for Nancy Tilford Carr (9 Oct 1816–17 Jan 1896), Find A Grave: Memorial #142052876, citing Plum Grove Cemetery, Humansville, Polk County, Missouri, USA ; Maintained by RCoberly (contributor 48440575) Unknown.
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DNA Connections
It may be possible to confirm family relationships with Nancy by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Nancy: