The Silverodeon is an organ or calliope that is, or at least was, one of the props in Master Payne's Circus of Adventure. According to music master André, it was [ once] [[Chronology - Volume #|✣ ]] "the finest music machine this side of the Carpathians." (However, there's reason to doubt whether he was serious, as will be seen.) When we first see it, it's looking rather poorly in the aftermath of the Spider Clank attack ... but not for long. All told, this is a pretty cool instrument.