NEW MYSTERY ADVENTURES was one of the longer-lived pulps to be published by Harold Hersey, lasting 25 issues from March 1935 through May 1937.  It was typical of many Hersey pulps in one respect--its title changed frequently.  It appeared as NEW MYSTERY ADVENTURES from March 1935 through April 1936, as MYSTERY ADVENTURE MAGAZINE from May 1936 through November 1936, as MYSTERY ADVENTURES for December 1936 and as MYSTERY ADVENTURES MAGAZINE from January 1937 through May 1937.  Although Hersey claimed that at one point, circulation was 600,000, this, like so many of his statements, is almost certainly pure exaggeration.