Despite a petition of 45,000 signatures, and a plea for clemency from many prominent figures at the time, including playwright George Bernard Shaw, both men were hanged for Wilson's murder at Wandsworth Prison on 10 August 1922 and buried within the prison grounds. In mid August 1929 Irish Republicans in London unveiled a plaque commemorating Dunne and O'Sullivan.
Despite a petition with over 45,000 signatures and pleas for mercy from prominent figures like playwright George Bernard Shaw, both men were hanged at Wandsworth Prison on August 10, 1922, and buried within the prison grounds. In mid-August 1929, Irish Republicans in London erected a plaque honoring Dunne and O'Sullivan.