A soldier in the Civil War contemplates an apparition of a horsemen in the sky and the reader wonders whether it is in fact a ghost or the delirium of this soldier that is creating this wild horse and its rider. Shots are fired by one soldier, one soldier hides in the bushes at the base of a cliff and with each scenario, I was struck more than anything by the language used.
Somehow, Bierce managed to use the words "accoutrement" and "bivouac" and for that I applaud him. Overall though, this story didn't do it for me. Even so, I'd give him another chance.