Williams, Walter Jon. "No Spot of Ground"
Divergence: 1849 CE
What if: Edgar Allan Poe did not die in 1849, but lived to become a Confederate general.
Summary: After Pickett becomes ill, Poe takes command of his troops at the battle of Hanover Junction during the Forty Days.
Published: In Isaac Asimov's Science Fiction Magazine, November 1989; What Might Have Been? Volume 2: Alternate Heroes (eds. Gregory Benford and Martin H. Greenberg), q.v.; and Facets, Tor 1990 (0312850190), 1991 (0812501810), Grafton 1992 (0586213872).