E Pluribus Unicorn

"Copyright, 1953" and LCCN 53-11914 on its copyright page.
"$2.75" price on jacket's front flap.
"Abelard Press" on title page, and Abelard logo on book spine.
The "Acknowledgments" on page vii are signed "Theodore Sturgeon / Congers, New York / July, 1953".
At end of Groff Conklin's "Essay on Sturgeon" is "June 4, 1953".
The "Appendix" is headed "Science Fiction and Fantasy by Theodore Sturgeon in Anthologies", and lists 8 Sturgeon stories published in 9 anthologies between 1942 and 1953.
Data verified in Tuck

Year	Reviewer	Publication
1954	The Editors	The Magazine of Fantasy and Science Fiction, February 1954
1954	Groff Conklin	Galaxy Science Fiction, April 1954
1954	Robert Frazier (I)	Fantastic Universe, May 1954
1954	P. Schuyler Miller	Astounding Science Fiction, August 1954
1955	P. Schuyler Miller	Astounding Science Fiction, January 1955
1956	Sam Moskowitz	Satellite Science Fiction, April 1957
1957	Hans Stefan Santesson	Fantastic Universe, April 1957
1957	Floyd C. Gale	Galaxy Science Fiction, May 1957
1961	Geoffrey D. Doherty	Vector 12, Summer 1961
1980	Baird Searles	Isaac Asimov's Science Fiction Magazine, March 1980
1983	Everett F. Bleiler	The Guide to Supernatural Fiction (Pages 455 - 723)

Wikipedia

Page	Title	Author(s)	Type
1	The Silken-Swift	Theodore Sturgeon	Short Story
25	The Professor's Teddy-Bear	Theodore Sturgeon	Short Story
38	Bianca's Hands	Theodore Sturgeon	Short Story
49	A Saucer of Loneliness	Theodore Sturgeon	Short Story
66	The World Well Lost	Theodore Sturgeon	Short Story
90	It Wasn't Syzygy	Theodore Sturgeon	Novelette
125	The Music	Theodore Sturgeon	Short Story
127	Scars	Theodore Sturgeon	Short Story
137	Fluffy	Theodore Sturgeon	Short Story
147	The Sex Opposite	Theodore Sturgeon	Novelette
181	Die, Maestro, Die!	Theodore Sturgeon	Novelette
222	Cellmate	Theodore Sturgeon	Short Story
237	A Way of Thinking	Theodore Sturgeon	Novelette
273	Appendix (E Pluribus Unicorn)	uncredited	Essay
ix	Essay on Sturgeon	Groff Conklin	Essay
vii	Acknowledgments (E Pluribus Unicorn)	Theodore Sturgeon	Essay

Title	Year	Publisher	Format	Type	Catalog ID	Cover Artist	Pages
E Pluribus Unicorn	1953	Nelson, Foster & Scott	Hardcover	Collection		A. M. Jauss	276
E Pluribus Unicorn	1956	Ballantine Books	Paperback	Collection	179	Richard Powers (artist)	211+[1]
E Pluribus Unicorn	1960	Abelard-Schuman	Hardcover	Collection		A. M. Jauss	275
E Pluribus Unicorn	1961	Panther	Paperback	Collection	1183	Bill Rose	192
E Pluribus Unicorn	1963	Panther	Paperback	Collection	1183	Bill Rose	192
E Pluribus Unicorn	1965	Ballantine Books	Paperback	Collection	U2247	Richard Powers (artist)	211
E Pluribus Unicorn	1965	Ballantine Books	Paperback	Collection	U2247	Richard Powers (artist)	211
E Pluribus Unicorn	1968	Panther	Paperback	Collection	11838		192
E Pluribus Unicorn	1969	Panther	Paperback	Collection	11838		192
E Pluribus Unicorn	1970	Ballantine Books	Paperback	Collection	01827	Robert Pepper	x+211
E Pluribus Unicorn	1977	Pocket Books	Paperback	Collection			x+211
E Pluribus Unicorn	1977	Pocket Books	Paperback	Collection			x+211
E Pluribus Unicorn	1979	Pocket Books	Paperback	Collection		Boris Vallejo	x+211
E Pluribus Unicorn	1984	Timescape / Pocket Books	Paperback	Collection		Boris Vallejo	x+211

Notes