stories in the Western series Kid Colt, Outlaw #134–135 (May and July 1967). Shortly thereafter, Trimpe and writer Gary Friedrich created Marvel's World War I aviator hero the Phantom Eagle in Marvel Super-Heroes #16 (Sept. 1968). Hulk and the Silver Age of Comics In the 1960s, during the period known as the Silver Age of Comics, Trimpe was assigned to pencil what became his signature character, the Hulk. Beginning with pencil-finishes over Marie Severin layouts in The Incredible Hulk vol. 2, #106 (Aug. 1968), he went on to draw the character for a virtually unbroken run of over seven years, through issue #142 (Aug. 1971), then again from #145–193 (Nov. 1971 – Nov. 1975). Additionally, Trimpe penciled the covers of five Hulk annuals (1969, 1971–72, 1976–77, titled King-Size Special! The Incredible Hulk except for #4, The Incredible Hulk Special), and both penciled and inked the 39-page feature story of The Incredible Hulk Annual #12 (Aug. 1983). Under the Marvel Method of writer-artist collaboration, Trimpe, like other Marvel artists of the time, was uncredited co-plotter of most of his stories, a working arrangement Trimpe said he enjoyed. Among the characters co-created by Trimpe during his run on the title were Jim Wilson in issue #131 (Sept. 1970) and Doc Samson in #141 (July 1971). During his time on the comic, he became the first artist to draw for publication the character Wolverine, who would go on to become one of Marvel's most popular. The character was conceived by Roy Thomas, written by Len Wein and designed by Marvel de facto art director John Romita Sr. as an antagonist for the Hulk, introduced in the last panel of The Incredible Hulk vol. 2, #180 (Oct. 1974) and making his first full appearance the following issue. Trimpe in 2009 said he "distinctly remembers" Romita's sketch, and that, "The way I see it, [Romita and writer Len Wein] sewed the monster together and I shocked it to life! ... It was just one of those secondary or tertiary characters, actually, that we were using in that particular book with no particular notion of it going anywhere. We did characters in The [Incredible] Hulk all the time that were in [particular] issues and that was the end of them." Trimpe co-created nearly all of the characters introduced during his run on The Incredible Hulk, with Wolverine being a rare exception. He said that he devised