 It was during this time that, from 11 August to 12 November 1920 in Cork County Gaol, Peter, along with his brother John Crowley, Michael Fitzgerald, Joe Murphy, Thomas Donovan, Michael Burke, Michael O’Reilly, Christopher Upton, John Power, Joseph Kelly and Seán Hennessy, underwent a hunger strike of 94 days, demanding reinstatement of political status and release from prison.This hunger strike was held parallel with that of Lord Mayor of Cork, Terence MacSwiney, who died in October 1920 after his 74th day on hunger strike.Peter Crowley and the other strikers still hold the Guinness World Record for longest hunger strike, though the record is no longer included in editions of the book to prevent people from starving themselves for the record.