Creator
Gerry Conway, John Romita, Ross Andru
Bob Mcleod, Chris Claremont
In Comics
The Amazing Spider-Man #129 - The Punisher Strikes Twice
Marvel Graphic Novel #4 - The New Mutants: Renewal
Base
Mobile, usually in New York City
(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