It appears Edwin's step-mother, Sarah, viewed the "riderless" horse at the gate.

Elizabeth Victoria Patrick Rembert died before Edwin enlisted. She is buried in the Ebenezer Cemetery, Copiah County.
Elizabeth V. P. w/o F. M. Rembert 11 Aug, 1825/3 Nov, 1861

Francis Marion Rembert remarried in Copiah County 22 March 1862 to Mrs. Sarah (Gordon) Wall. Sarah Gordon was the widow of Rev. Wm. B. Wall.

Francis Marion Rembert is buried in the Wesson Cemetery, Copiah County.
Francis M(arion) Rembert 27 May, 1823 /2 Mar, 1914

There is a Private F.M. Rembert listed as a member of the 3rd. Mississippi Cavalry (State Troops), Company E.

Hope this helps,
Mitchell