In this column: blues enthusiasts, folklorists, musicologists, Lawrence Gellert, the lomaxes, John Avery Lomax, Edison Cylinder Phonograph, Presto Recorders, Robert Gordon, Ruby Terrill Lomax, Alan Lomax, balladhunter, Library of Congress, Virginia Lebermann, the Songhunter Documentary, Michael Taft, Cat Iron, Sam Chatmon, Magnecord, Ampex, Kudelski Nagra, RCA D77, Altec Lipstick, Jean Ritchie, George Mitchell, Wollensak recorder, …