Marvel Mystery Comics (1939) #86 provides an enjoyable reminder that Marvel history is built from individual issues with their own rhythms, risks and small surprises. The issue was published on 1 June 1948 as part of Marvel Mystery Comics, with Disappearing Watchman providing the clearest point of entry. Its premise connects Sub Mariner with questions of truth and suspicion. That combination gives the opening a purpose beyond simply announcing another adventure. The plot is