Chabon, Michael. "The Martian Agent"
Summary: Set in a 19th-century U.S. that never seceded from British rule.
Published: In McSweeney's Quarterly Concern #10 (Winter 2002-03); McSweeney's Mammoth Treasury of Thrilling Tales (ed. Chabon), Vintage 2003 (140003339XBUY); and Steampunk (eds. Ann VanderMeer and Jeff VanderMeer), Tachyon 2008 (1892391759BUY).