Has anyone heard of this Civil War event?
I'd like to find documentation or graves, or some type of proof:

As told by Robert Wayne Helton in letter dated November 22, 1970 to Patrice Wyatt
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Bertha Ellen Black Helton (1890-1966),
wife of Elisha Helton (1886-1953) told this story to me.
She heard it from Margaret Blanton Vaughn (1847-1926).

Margaret's parents, John and Nancy Blanton, were in a buggy going to town.
The road was narrow and full of curves with large trees growing on both sides which grew into an arch over the road.
This made it very dark and spooky, even in full sun light.
The horses refused to go around the bend in the road and shied away acting wild and frightened.
John got out, took his gun, and went to see what was up ahead.
When he could see around the bend in the road, he suddenly turned and ran back to the buggy saying there were a bunch of men hanging from the trees.
He got the buggy turned around and went back to the nearest house, where some of his kin lived.
He told them what he had seen and they all went back to the tree.
And there were seven of their relatives hanging by the neck – dead.
A sign was on one which said,
"Anyone taking down these bodies before sun down tomorrow will suffer a like fate."
It is said they were executed by the Confederate John Hunt Morgan because one of the local people shot one of his soldiers.
The Blanton's also were in the Union Army.