- Script
- Arnold Drake (credited as Drake)
- Pencils
- Werner Roth (credited as Roth)
- Inks
- John Verpoorten (credited as Verpoorten)
- Colors
- ?
- Letters
- Sam Rosen (credited as Rosen)
- First Line of Dialogue or Text
- Yes, Henry McCoy, you neatly overcame my band of skilled warriors...an amazing feat for one so young!
- Genre
- superhero
- Characters
- X-Men: Angel [Warren Worthington III]; Cyclops [Scott Summers]; Iceman [Bobby Drake]; Professor X [Charles Xavier]
Beast [Hank McCoy] (origin continued, as a teenager); El Conquistador; Edna McCoy; Norton McCoy; Joe; Tony
- Universe
- Marvel : mainstream
- Reprints
- in Amazing Adventures (Marvel, 1970 series) #17 (March 1973) [pages 3-5]
which is reprinted- in Strange (Editions Lug, 1970 series) #53 (5 mai 1974)
- in Spidey (Editions Lug, 1979 series) #69 (10 octobre 1985)
- in X-Men: Mutations (Marvel, 1996 series) ([December] 1996) [pages 13-15]
- in Marvel Special (Marvel Italia, 1994 series) #12 (Novembre 1997) [abridged]
- in Marvel Masterworks: The X-Men (Marvel, 2003 series) #5 ([August] 2005)
- in Essential Classic X-Men (Marvel, 2006 series) #2 (2006) [black and white]
- in The X-Men Omnibus (Marvel, 2009 series) #2 (2011)
- in X-Men : l'intégrale (Panini France, 2002 series) #1969-1970 (décembre 2011)
- in Marvel Classic (Panini France, 2011 series) #6 (avril 2012)
- in X-Men Epic Collection (Marvel, 2014 series) #3 - The Sentinels Live (2018)
The Origins of the Uncanny X-Men! part 15, origin of the Beast part 4, pages 1 and 2 of this story is not reprinted in the Amazing Adventures #17 and X-Men: Mutations #nn reprints. First appearance of Cerebro.
- Script
- ?
- Pencils
- Jim Steranko (illustrations)
- Inks
- John Tartaglione (illustrations)
- Colors
- ?
- Letters
- Sam Rosen; typeset
- Characters
- Angel; Beast; Cyclops; Iceman; Magneto; Marvel Girl; Polaris
- Reprints
Letters from: Glen Quasny, Barry Bernard, Sheldon Wiebe, Bill Bagwell, Jim Vicko, Bryan Uhlenbrock, and Doug Pratz; Know Ye These, the Hallowed Ranks of Marveldom.