Biography
Herbert Mahler was secretary of the IWW General Defense Committee and treasurer of the Everett Defense Committee. Herbert Mahler came from Seattle, Washington. He was convicted at the mass IWW trial in Chicago, sentenced to hve years in prison and fined $30,000. He served in the Cook County Jail and Leavenworth Penitentiary from September 1917 to March 1918 and from September 1918 to May 14, 1922, when his sentence expired.
Printed page 14 reports IWW defense secretary Herbert Mahler was arrested upon arrival in Cleveland and held incommunicado for fifty-six hours while visiting striking charwomen at Terminal Tower. It also names Peter Suto of Detroit, held eighty-four hours, and Chicago organizer Fred W. Thompson as arrested on the same suspicious-person accusation. The General Defense Committee called for protests. These April 1935 strike-related arrests are separate from their earlier federal or California imprisonments. No sentence or exact custody endpoints are supplied. Source: https://www.marxists.org/history/usa/pubs/socialist-call/v1n06-apr-27-1935.pdf
The March 1920 One Big Union Monthly roster, printed as MAHLER , HERBERT, reports: Federal. Indicted Chicago September 28, 1917. Conspiracy to violate Sections 6, 9, 19 and 37 and Section 4 of the Espionage Act. Convicted; five-year imposed sentence, $5,000 bail. Leavenworth Federal prison. The roster is a contemporary labor-defense account. Its indictment, bail and imposed-term information is kept distinct from actual admission/release and complete time served; no missing gate date is inferred. Source: https://www.marxists.org/history/usa/pubs/one-big-union-monthly/v02n03-mar-1920_One%20Big%20Union.pdf#page=14
The dictionary records Mahler’s birth in Chatham, Ontario on November 6, 1890 and describes him as an Industrial Workers of the World labor leader and organizer active in radical causes. It gives his death only as August 1961 in New York City; that month-level report does not replace the more precise death date already recorded here.
Jacob Rader Marcus, editor, and Judith M. Daniels, associate editor, The Concise Dictionary of American Jewish Biography, printed page 410 (PDF page 409).
The March1922 official report lists Herbert Mahler in List1 of convicted prisoners or parolees. The government entry reports Conspiracy (espionage act). a sentence of August 30, 1918, 5 years at Leavenworth and fined $20,000.. Imposed terms, projected term-expiration dates, parole eligibility and intervals on bond are different measures; none is entered as a complete actual custody total. This attributed government entry is retained alongside the independently established individual chronology. [PDF13]
Government Prosecutions under the Espionage Act, Senate Document159 (March1922), PDF page 13.