Later that year the "Boston Post" disclosed that Muck had been having an affair with a 20-year-old in Boston's Back Bay and had written her a letter reading in part: "I am on my way to the concert hall to entertain the crowds of dogs and swine who think that because they pay the entrance fee they have the right to dictate to me my selections. I hate to play for this rabble ... a very short time our gracious Kaiser will smile on my request and recall me to Berlin ... Our Kaiser will be prevailed upon to see the benefit to the Fatherland of my obtaining a divorce and making you my own."