For what it's worth, Mary's tombstone does not appear in the Confederate Veteran Grave Database

Last Name: Mooty Born: 20 Aug. 1836
Given Name: William Young Died: 27 Aug. 1912

Military Unit Information

Company: K Branch: Cavalry
Unit: 2nd Regt. State Guards State: Georgia
Rank: Private

Grave Information

Cemetery Name: Mooty Section:
Street: Cameron Mill Road Lot:
City: Grave Number:
County: GPS Latitude: 33.1029003
State: GPS Longitude: -85.0802177

Grave Markers: Civilian Headstone? -- Military Marker? Yes Southern Cross of Honor? --
http://csagraves.com/search.php

Moody [sic] Cemetery is shown on a Goggle Map at:
https://maps.google.com/maps?hl=en