Green, Roland J. "Exile's Greeting"
Divergence: c 1780 CE
What if: The American Revolution failed.
Summary: HMS Bellerophon prepares to transport a defeated enemy leader to exile on St. Helena, but is he Napoleon?
Published: In Microcosmic Tales: 100 Wondrous Science Fiction Short-Short Stories (eds. Isaac Asimov, Martin H. Greenberg and Joseph D. Olander), Taplinger 1980 (0800852389) and DAW 1992 (0886775329).