Creator
Chris Claremont, Herb Trimpe
Bob Mcleod, Chris Claremont
In Comics
Captain Britain #8 (December, 1976)
Marvel Graphic Novel #4 - The New Mutants: Renewal
Base
Xavier Institute, Salem Center, Westchester County, New York formerly Braddock Manor, United Kingdom; Australian Outback
(current) X-Factor Investigations, New York City (former)Professor Xaviers School of Gifted Youngsters, Salem Center, Westchester County, New York; Muir Island, Scotland; X-Factor headquarters, Embassy Row, Washington, D.C.; X-Factor Headquarters, New Yo