Pantomime traditions, especially "Peter Pan", are performed quite often, and a few American theatre companies produce traditional British-style pantomime as well as American adaptations of the form. According to Professor Russell A. Peck of the University of Rochester, the earliest pantomime productions in the US were "Cinderella" pantomime productions in New York in March 1808, New York again in August 1808, Philadelphia in 1824, and Baltimore in 1839. A production at Olympic Theatre in New York of "Humpty Dumpty" ran for at least 943 performances between 1868 and 1873, (one source says 1,200 performances), becoming the longest-running pantomime in history. In
Baron Zemo Avengers" #4 (March 1964); the character did not actually appear in person and was not identified as Heinrich Zemo until "The Avengers" #6 (July 1964) and "Sgt. Fury and His Howling Commandos" #8, in the same month. Zemo was retroactively added into the history of Captain America upon the hero's reintroduction to the Silver Age two issues prior. The character subsequently appears in "The Avengers" #7 (August 1964), #9-10 (October–November 1964), "Tales of Suspense" #60 (December 1964), and "The Avengers" #15 (April 1965), in which he is killed. Since then Helmut Zemo (Heinrich Zemo's son) uses the Baron Zemo title