Twenty- Seven CORE Freedom Riders, many of them fresh from beatings with fists, boots and iron bars, stood in their cells in the Hinds County, Mississippi, jail and sang. They sang new versions of old folk and gospel songs such as "We Shall Overcome Someday." "For the first time in history," wrote James Farmer, CORE's national director and one of the jailed Freedom Riders, "the Hinds County jail rocked with unrestrained singing of songs about freedom and brotherhood."
Source
CORE NY (1962) pg 1-10