Biography
L. M. van Wingerden, an IWW delegate identified as E1300, wrote from the county jail in Portland, Oregon, on January 15, 1920. His first-person article describes his prison cell and defends industrial unionism in response to accusations that IWW members were radicals. The surviving letter establishes confinement at its date but supplies no arrest day, release, charge or complete custody duration. The initials are not expanded. Source: https://www.marxists.org/history/usa/pubs/one-big-union-monthly/v02n03-mar-1920_One%20Big%20Union.pdf#page=51