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Here is a FindaGrave memorial for a person of that name in Virginia:
Find A Grave, database and images (https://www.findagrave.com : accessed 04 August 2018), memorial page for Mortimer Buckner Moseley (12 Apr 1828–5 Dec 1901), Find A Grave Memorial no. 36235552, citing Old Winn/Bing/Curtis/Davis Cemetery, Baskerville, Mecklenburg County, Virginia, USA ; Maintained by Carolyn Davis (contributor 47114196) .
I think this is his family in 1880:
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MC5V-BZL : 15 July 2017), M B Mosely, Buckhorn, Mecklenburg, Virginia, United States; citing enumeration district ED 143, sheet 84A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1377; FHL microfilm 1,255,377.
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