New York Times: "Finding a New Music Director the Old-Fashioned Way," October 8, 2000, accessed February 8, 2010]. The revelation appeared in a 12-part "expose" that ran in the Boston Post beginning on November 9, 1919, which claimed to use documents police and federal agents had seized after Muck's arrest. Bowles, 413-4
Why Muck was not deported more promptly after the end of hostilities is unclear, but see New York Times: "Karl Muck not Deported," July 17, 1919, accessed January 13, 2010