Biography
Henry Hammer was a teamster from Osseu, Minnesota. Henry Hammer was convicted at the mass IWW trial in Sacramentoand sentenced to ten years in prison. He served in Leavenworth Penitentiary from August 1918 to December 22, 1923.
The March1922 official report lists Henry Hammer in List1 of convicted prisoners or parolees. The government entry reports Conspiracy and violating the espionage act. a sentence of January 17, 1919, 10 years in Leavenworth Penitentiary.. 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. [PDF9]
Government Prosecutions under the Espionage Act, Senate Document159 (March1922), PDF page 9.