Biography
Harry Cantor was a printer imprisoned for carrying a banner at the 1928 Sacco-Vanzetti memorial denouncing Governor Gardner as responsible for their executions. J. Louis Engdahl’s article in the Daily Worker of August 19, 1930, page 1, describes Cantor as just released from a one-year sentence at Deer Island Prison and as the intended main speaker at the third-anniversary Boston memorial, for which police had denied use of Boston Common. It does not provide an exact arrest, sentence, admission or physical release day, nor a formal statutory charge. The one-year imposed sentence is not converted into an exact completed custody duration. Source: https://www.marxists.org/history/usa/pubs/dailyworker/1930/v07-n199-NY-aug-19-1930-DW-LOC.pdf
The June 1930 Labor Defender photograph caption explicitly describes Cantor as just released from Deer Island after serving one year and shows him speaking on Boston Common on May 1. It says his prosecution concerned calling Governor Fuller the murderer of Sacco and Vanzetti; the existing August newspaper account instead names Gardner. The names and timing discrepancy are preserved as source claims. This caption reports completed service in rounded years, without an exact physical discharge day. Source: https://www.marxists.org/history/usa/pubs/labordefender/1930/v05n06-jun-1930-LD.pdf#page=2
The June 1930 Labor Defender captions a photograph of Harry Cantor speaking on Boston Common on May 1 after release from Deer Island. It attributes his imprisonment to denouncing Governor Fuller over the Sacco-Vanzetti executions and describes one year served. This is an earlier release-by-May-1 attestation than the existing August report; it gives no exact discharge day and does not establish a new arrest. Source: https://www.marxists.org/history/usa/pubs/labordefender/1930/v05n06-jun-1930-LD.pdf#page=2
