John Barach whipped up a very nice list. Good job! (I wish you'd done it 12 hours earlier, but still.)
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Here's a list of Wolfe stories (though I can't guarantee that they're all stories, since I haven't seen most of them!) which aren't found in any of his collections, including Bibliomen, Young Wolfe, For Rosemary, and Plan(e)t Engineering:
* The Arimaspian Legacy, Cheap Street, 1987
* At the Point of Capricorn, Cheap Street, 1983
Weird Tales Spring 1988
* The Boy Who Hooked the Sun, Cheap Street, 1985
Weird Tales Spring 1988
The Year's Best Fantasy: Second Annual Collection, ed. Ellen
Datlow & Terri Windling, St. Martin's, 1989
* Copperhead, http://www.scifi.com/scifiction/originals/originals_archive/wolfe/wolfe1.html
* The Eleventh City
Graven Images: Fifteen Tales of Myth and Magic, ed. Nancy
Kilpatrick and Thomas S. Roche, Ace, 2000.
* Empires of Foliage and Flower, Cheap Street, 1987
Crank! #2 '93
The Best of Crank!, ed. Bryan Cholfin, Tor, 1998
* The Fat Magician, Such a Pretty Face, ed. Lee Martingdale, 2000.
* A Fish Story, F&SF, Oct/Nov. 1999.
The Mammoth Book of Best New Horror 11, ed. Stephen Jones,
Robinson, 2000.
* Four Wolves, Amazing, 1983.
UME reports this as being a group title for 4 pieces: At the Volcano's Lip (SFTOH as part of Redwood Coast Roamer), In the Mountains (ditto), My Book (ES), and The River. Thus "The River" is the only short-short not collected.
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* The Friendship Light, F&SF Oct '89
The Best from Fantasy & Science Fiction: A 45th Anniversary
Anthology, ed. Edward L. Ferman & Kristine Kathryn
Rusch, St. Martin's, 1994
* Game in the Pope's Head, Ripper!, ed. Gardner Dozois & Susan
Casper, Tor, 1988
The Year's Best Fantasy: Second Annual Collection, ed. Ellen
Datlow & Terri Windling, St. Martin's, 1989
* Going to the Beach, Showcase, ed. Roger Elwood, 1973.
* Has Anybody Seen Junie Moon?, Moon Shots, ed. Peter Crowther and
Martin Greenberg, DAW, 1999.
* Houston, 1943, Tropical Chills, ed. Tim Sullivan, Avon, 1988
* How I Got Three Zip Codes
The Mammoth Book of Seriously Comic Fantasy, ed. Mike Ashley,
Robinson, 1999.
* How the Bishop Sailed to Inniskeen, Spirits of Christmas, ed.
Kathryn Cramer & David G. Hartwell, Wynwood, 1989
IASFM Dec '89
* In Glory Like Their Star, F&SF, 2001.
* It's Very Clean, Generation, ed. David Gerrold, Dell, 1972
Cybersex, ed. Richard Glyn Jones, Raven, 1996
* Joe and Me, Locus 45, July 2000.
* Kid Sister, Dancing with the Dark, ed. Stephen Jones, Vista, 1997
* King Under the Mountain, If 1970.
* The Legend of XI Cygnus, F&SF Oct/Nov '92
I believe it is "Xi Cygnus." [Sorry I forgot to mention this one: it has a brown book feel, but it probably isn't a brown book story.]
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* Loco Parentis, Again, Dangerous Visions, ed. Harlan Ellison,
Doubleday, 1972.
(as part of Mathoms from the Time Closet)
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* Lord of the Land, Lovecraft's Legacy, ed. Robert Weinberg
& Martin H. Greenberg, Tor, 1990
Best New Horror 2, ed. Stephen Jones & Ramsey Campbell,
Robinson, 1991
The Giant Book of Best New Horror, ed. Stephen Jones &
Ramsey Campbell, Magpie, 1993
Cthulhu 2000: A Lovecraftian Anthology, ed. Jim Turner,
Arkham House, 1995
* Mathoms from the Time Closet (group title for 3 pieces: Against the Lafayette Escadrille [BOD, COD], Loco Parentis, Robot's Story), Again, Dangerous Visions
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* A Method Bit in "B," Orbit 8, 1970.
* The Monday Man, Monochrome: The Readercon Anthology, ed.
Bryan Cholfin, Broken Mirrors Press, 1990
* The Night Chough, The Crow: Shattered Lives & Broken Dreams, ed.
J. O'Barr & Ed Kramer, Ballantine Del Rey, 1998
* The Old Woman Whose Rolling Pin is the Sun, Cheap Streat.
Street.
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* Petting Zoo, Return of the Dinosaurs, ed. Mike Resnick & Martin
H. Greenberg, DAW, 1997
Year's Best SF 3, ed. David G. Hartwell, HarperPrism, 1998
* Queen, Realms of Fantasy, 2001.
* Read Me, The Drabble Project, ed. Rob Meades & David B. Wake,
Beccon Publications, 1988
* Remembrance to Come, Orbit 6, 1970.
* The River (as part of Four Wolves) Amazing 5-83
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* Robot's Story, Again, Dangerous Visions, ed. Harlan Ellison,
Doubleday, 1972.
(as part of Mathoms from the Time Closet)
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* The Sailor Who Sailed After the Sun, Grails: Quests,
Visitations and Other Occurences, ed. Richard Gilliam,
Martin H. Greenberg & Edward E. Kramer, Atlanta, GA:
Unnameable Press, 1992
The Year's Best Fantasy and Horror: Sixth Annual Collection,
ed. Ellen Datlow & Terri Windling, St. Martin's, 1993
Grails: Quests of the Dawn, ed. Richard Gilliam, Martin
H. Greenberg & Edward E. Kramer, Penguin/Roc, 1994
* The Seraph from the Sepulcher, Sacred Visions, ed. Andrew M. Greeley &
Michael Cassutt, Tor, 1991
* Slow Children at Play, Cheap Street: New Castle, VA, 1989
* The Tale of the Four Accused, Arabesques 2, ed. Susan Shwartz,
Avon, 1989
* Tarzan of the Grapes, F&SF, 1972
Mother Was a Lovely Beast, ed. Philip Jose Farmer,
Chilton, 1974.
* Thou Spark of Blood, If 1970.
* A Travelers in Desert Lands, The Lost Continent: New Tales
of Zothique, ed. John Pelan, Shadowlands, 1999.
Traveler
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* The Tree Is My Hat
999, ed. Al Sarrantonio, 1999.
The Year's Best Fantasy and Horror, Thirteenth Annual
Collection, eds. Ellen Datlow & Terri Windling Griffen, 2000.
* Try and Kill It, Asimov's Oct/Nov '96
* The Waif, F&SF, Jan. 2002.
* The Walking Sticks
Taps and Sighs, ed. Peter Crowther, Subterranean Press, 2000.
Year's Best Fantasy # 1, ed. David G. Hartwell, Tor, 2001.
* Wolfer, Wild Women, ed. Melissa Mia Hall, Carroll & Graf, 1997
* The Woman Who Went Out, F&SF Jun '85
This one is chapter 4 of SOLDIER IN THE MIST.
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* Wrapper
Lamps on the Brow, 1998.