I included "The Cleaning Machine" in Secret Stories because it involves one of the 7 Infernals. I'm not exactly sure when it happens and the story has no impact on other stories in the Secret History (although neither does "Pelts" for that matter), so I don't think it matters. It shares a common framing sequence and character -- Detective Burke -- with "Menage a Trois" (which is directly related to Sibs) which I don't have listed either. Trying to list the chronology of every related story will lead to madness, I am sure.
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