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Allucquere (a.k.a. "Mary") – The Puppet Masters (A)
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Security Chief Juan Alvarez – The Moon Is a Harsh Mistress (A)
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Richard Ames (a.k.a. Colin Campbell) – The Cat Who Walks Through Walls (A)
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Sam Anderson – Starman Jones (A)
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Anne (Fair Witness) – Stranger in a Strange Land (A)
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Major Ardmore – Sixth Column (A)
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Pallas Athene, originally Minerva – Time Enough for Love, The Cat Who Walks Through Walls (A)
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Dr. Hartley M. Baldwin (a.k.a. "Kettle Belly," "Mr. Two-Canes") – Gulf, Friday, The Cat Who Walks Through Walls (B)
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Col. Richard Baslim a.k.a. "Baslim the Cripple" – Citizen of the Galaxy (B)
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Thorby Baslim a.k.a. Thor B. Rudbek "Rudbek of Rudbek at Rudbek" – Citizen of the Galaxy (B)
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Gillian Boardman (Jill) – Stranger in a Strange Land (B)
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Joseph Bonforte – Double Star (B)
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Eunice Branca – I Will Fear No Evil (B)
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Jacob Burroughs – The Number of the Beast, The Cat Who Walks Through Walls (B)
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Hilda Burroughs (nee Hilda Corners) – The Number of the Beast, The Cat Who Walks Through Walls, To Sail Beyond the Sunset (B)
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Thomas and Patrick Bartlett – Time for the Stars (B)
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Colonel Colin Campbell (a.k.a. Richard Ames) – The Cat Who Walks Through Walls (C)
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Dejah Thoris "Deety" Burroughs Carter – The Number of the Beast, The Cat Who Walks Through Walls (C)
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Zebadiah Carter – The Number of the Beast, The Cat Who Walks Through Walls (C)
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Ben Caxton – Stranger in a Strange Land (C)
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Eldreth Coburn – Starman Jones (C)
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Grace Cormet – We Also Walk Dogs (C)
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Hilda Corners – see Hilda Burroughs (C)
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Ed Cowen – The Star Beast (C)
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Cynthia Craig – The Unpleasant Profession of Jonathan Hoag (C)
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Cuddlepup – The Star Beast (C)
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John Ezra Dahlquist (Johnny) – The Long Watch. Referred to (under the name Ezra Dahlquist) in Space Cadet. (D)
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Daniel Boone Davis – The Door into Summer (D)
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Hazel Meade Davis (Sadie Lipschitz) (Gwendolyn Novak) The Cat Who Walks Through Walls (see also Hazel Stone below) (D)
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Manuel Garcia O'Kelly Davis (Mannie) – The Moon Is a Harsh Mistress, The Cat Who Walks Through Walls (D)
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Doctor-Livingston-I-Presume (cat) – Farnham's Freehold (D)
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Matt Dodson – Space Cadet (D)
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Dora (computer) – Time Enough for Love, The Number of the Beast,The Cat Who Walks Through Walls (D)
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Dora Smith (Adorable Dora) (Dorable) – Time Enough for Love (D)
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Dorcas – Stranger in a Strange Land (D)
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Dr. Archibald Douglas – Let There Be Light (D)
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Chief Dreiser – The Star Beast (D)
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Duke Farnham – Farnham's Freehold (F)
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Grace Farnham – Farnham's Freehold (F)
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Hugh Farnham – Farnham's Freehold (F)
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Karen Farnham – Farnham's Freehold (F)
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Justin Foote – Methuselah's Children (F)
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Justin Foote 45th – Time Enough for Love, The Cat Who Walks Through Walls (F)
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Friday a.k.a. Marjorie Baldwin – Friday (F)
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Clark Fries – Podkayne of Mars (F)
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Podkayne Fries – Podkayne of Mars (F)
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Dr. Ftaeml – The Star Beast (F)
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Fuzzy Britches (flat cat) – The Rolling Stones (F)
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Larry Gaines – The Roads Must Roll (G)
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Galahad – Time Enough for Love (G)
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Gay Deceiver – The Number of the Beast, To Sail Beyond the Sunset, The Cat Who Walks Through Walls (G)
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Gekko – 'Red Planet (G)
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Frederica "Ricky" Gentry – The Door into Summer (G)
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Alec Graham / Alex Hergensheimer – Job: A Comedy of Justice (G)
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Joe Green – Gulf (G)
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Sergei Greenberg – The Star Beast (G)
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Joe-Jim Gregory – Orphans of the Sky (G)
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Oscar Gordon – Glory Road (also appears briefly in 'The Number of the Beast) (G)
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Delos D. Harriman – The Man Who Sold the Moon, Requiem, To Sail Beyond the Sunset (H)
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Jubal Harshaw – Stranger in a Strange Land, The Number of the Beast, The Cat Who Walks Through Walls, To Sail Beyond the Sunset, Citizen of the Galaxy (as James J. Garsh) (H)
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Don Harvey – Between Planets (H)
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Gretchen Henderson, daughter of Ingrid Henderson – The Moon Is a Harsh Mistress, The Cat Who Walks Through Walls, To Sail Beyond the Sunset (H)
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Ingrid Henderson Jinx Henderson's wife, direct descendant of Hazel Stone – The Cat Who Walks Through Walls (H)
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Jinx Henderson, born John Black Eagle, took Ingrid Henderson's surname when he married her – The Cat Who Walks Through Walls (H)
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Wolf Henderson, Ingrid Henderson's son – The Cat Who Walks Through Walls (H)
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Alex Hergensheimer / Alec Graham – Job: A Comedy of Justice (H)
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Mycroft "Mike" Holmes (a.k.a. Adam Selene, Mychelle Holmes) – The Moon Is a Harsh Mistress (H)
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Myra Holtz – The Star Beast (H)
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Ira Howard – Methuselah's Children (H)
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Jonathan Hoag – The Unpleasant Profession of Jonathan Hoag (H)
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Hugh Hoyland – Orphans of the Sky (H)
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William 'Tex' Jarman – Space Cadet (J)
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Oscar Jensen – Space Cadet (J)
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Maureen Johnson – see Maureen Johnson Smith, below (J)
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Joseph – Farnham's Freehold (J)
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Max Jones – Starman Jones (J)
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Zebadiah Jones – If This Goes On— (J)
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Karen – Gulf (K)
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Henry Gladstone Kiku – The Star Beast (K)
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Wyoming Knott (Wyoh) – The Moon Is a Harsh Mistress (K)
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Stuart Rene LaJoie – The Moon Is a Harsh Mistress (L)
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Andrew Jackson Libby, later Elizabeth A. J. Libby Long – Misfit, Methuselah's Children, Time Enough for Love, The Cat Who Walks Through Walls. Also known as "Slipstick" Libby, and in Misfit, has the nickname "Pinky". The Number of the Beast (L)
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Elizabeth Andrew Jackson Libby Long (originally Andrew Jackson Libby) – The Number of the Beast a.k.a. "Pinky" and "Slipstick" (L)
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Maureen Johnson Smith Long – see Maureen Johnson Smith, below (L)
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Lapis Lazuli Long – Time Enough for Love, The Number of the Beast (L)
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Llita – Time Enough for Love (L)
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Lazarus Long (a.k.a. Woodrow Wilson Smith) – Methuselah's Children, Time Enough for Love, The Number of the Beast, The Cat Who Walks Through Walls, To Sail Beyond the Sunset (L)
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Lorelei Lee Long – Time Enough for Love, The Number of the Beast (L)
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Lummox – The Star Beast (L)
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John Lyle – If This Goes On— (L)
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Mr. MacClure – The Star Beast (M)
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Dr. Mahmoud (a.k.a. "Stinky") – Stranger in a Strange Land (M)
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Margrethe – Job: A Comedy of Justice (M)
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Jim Marlowe – Red Planet (M)
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Dr. Mary Lou Martin – Let There Be Light (M)
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Mary (a.k.a. "Allucquere") – The Puppet Masters (M)
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Helen Mayberry – Time Enough for Love (M)
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Gloria McNye – Delilah and the Space Rigger (M)
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Memtok – Farnham's Freehold (M)
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Minerva – intelligent computer used to run the planet Secundus – Time Enough for Love, The Cat Who Walks Through Walls (M)
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Miriam – Stranger in a Strange Land (M)
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Frank Mitsui – Sixth Column (M)
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Mort the Wart – The Moon Is a Harsh Mistress (M)
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Mycroft – see Mycroft "Mike" Holmes, above, The Moon Is a Harsh Mistress (M)
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Mother Thing – Have Space Suit—Will Travel (M)
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Andrew Nivens, a.k.a. "The Old Man" – The Puppet Masters (his name is not mentioned, only inferred – the President calls him Andrew and his son's last name is Nivens) (N)
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Elihu Nivens, a.k.a. Sam Cavanaugh – The Puppet Masters (N)
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Gwen Novak – The Cat Who Walks Through Walls (N)
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Dr. Sven Nelson – Stranger in a Strange Land (N)
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Judge O'Farrell – The Star Beast (O)
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Bernardo de la Paz (Prof) – The Moon Is a Harsh Mistress (P)
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Patty Paiwonski – Stranger in a Strange Land (P)
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Penny – Double Star (P)
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Petronius The Arbiter a.k.a. Pete (cat) – The Door into Summer (P)
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Peewee – Have Space Suit—Will Travel (P)
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Longcourt Phyllis – Beyond This Horizon (P)
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Hugo Pinero – Life-Line (P)
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Pixel (cat) – The Cat Who Walks Through Walls, To Sail Beyond the Sunset (P)
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Ponse, The Lord Protector – Farnham's Freehold (P)
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Pug – Glory Road (P)
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Random Numbers (Cat) – To Sail Beyond the Sunset (R)
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Rhysling, "Blind singer of the spaceways" – The Green Hills of Earth, Time Enough for Love (R)
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Juan Rico – Starship Troopers (R)
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Wes Robbins – The Star Beast (R)
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Rufo – Glory Road, The Cat Who Walks Through Walls (R)
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Clifford "Kip" Russell – Have Space Suit—Will Travel (R)
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Nehemiah Scudder – If This Goes On— (S)
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Johann Sebastian Bach Smith (later Joan Eunice Smith Solomon) – I Will Fear No Evil (S)
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Sister Maggie – If This Goes On— (S)
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Maureen Johnson Smith – Time Enough for Love, The Cat Who Walks Through Walls, To Sail Beyond the Sunset, The Number of the Beast (S)
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Valentine Michael Smith – Stranger in a Strange Land (S)
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Woodrow Wilson Smith – birth name of Lazarus Long (see above) (S)
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Lawrence Smythe (The Great Lorenzo) – Double Star (S)
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Jacob Moshe Solomon – I Will Fear No Evil (S)
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Betty Sorenson – The Star Beast (S)
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Mary Sperling – Methuselah's Children, Time Enough for Love (S)
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Star, a.k.a. Her Wisdom – Glory Road, The Cat Who Walks Through Walls (S)
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Lowell "Buster" Stone – The Rolling Stones (S)
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Castor Stone – The Rolling Stones, The Number of the Beast, The Cat Who Walks Through Walls (S)
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Edith Stone – The Rolling Stones (S)
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Hazel Stone – The Rolling Stones, The Moon Is a Harsh Mistress, The Number of the Beast, The Cat Who Walks Through Walls (see also Hazel Meade Davis, above) (S)
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Pollux Stone – The Rolling Stones, The Number of the Beast, The Cat Who Walks Through Walls (S)
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John Thomas Stuart – The Star Beast (S)
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Meade Stone – The Rolling Stones (S)
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Edith Stone – The Rolling Stones (S)
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John Thomas – The Star Beast (T)
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Dejah Thoris – see Dejah Carter, above (T)
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Colonel Towers – The Long Watch (T)
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Becky Vesey (a.k.a. Madame Alexandra Vesant) – Stranger in a Strange Land (V)
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"Shorty" Van Kleeck – The Roads Must Roll (V)
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Rod Walker – Tunnel in the Sky (W)
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Ira Weatheral – Time Enough for Love (W)
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Barbara Wells – Farnham's Freehold (W)
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Willis (Bouncer) – Red Planet (W)
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