Biography
John McRae was an IWW member from Eureka. John McRae received a three-year prison sentence for having an IWW membership card and served in San Quentin from April 27, 1924, until his term expired.
The International Labor Defense holiday roster in the December 29, 1925 Daily Worker lists this prisoner, printed as John McRae, at San Quentin California. Its printed identifier is 39347; this is a prison number or mailing designation, not a year or a custody date. This documents confinement at the roster’s reporting time, without establishing an admission, transfer, release, new conviction or complete duration. Existing independently sourced custody chronology remains separate. Source: https://www.marxists.org/history/usa/pubs/dailyworker/1925/1925-ny/v02b-n297-NYE-dec-29-1925-DW-LOC.pdf#page=5
The Daily Worker political-prisoner Christmas roster of December 17, 1924, lists John McRae at San Quentin State Prison with historical prisoner number 39347. This establishes a contemporary custody observation, not an admission or release date and not a total duration.