Entered from booking ledger and New York Times article; stated time is appproximate.
From the article: "More than 1,500 persons gathered at Carnegie Hall last night to greet Communist leaders released from prison terms for conspiracy to teach and advocate the violent overthrow of the Government."
"1,500 AT RALLY HERE GREET FREED REDS." New York Times (1923-), Jul 25 1957, p. 12. ProQuest. Web. 8 Sep. 2021.