O'Brien, W., Anderson, J., & Irish Transport and General Workers' Union. (1921). Copy letter from William O'Brien to Sir John Anderson informing him of a visit to his house by the Crown Forces, the damage they caused to his records which dealt with the Trade Union, Socialist, and Co-operative movements for the past 30 years, the removal of these records from his home and a reply letter on the behalf of Sir John Anderson notifying O'Brien that the case will be thoroughly investigated.

O'Brien, William, et al. Copy Letter from William O'Brien to Sir John Anderson Informing Him of a Visit to His House by the Crown Forces, the Damage They Caused to His Records Which Dealt with the Trade Union, Socialist, and Co-operative Movements for the Past 30 Years, the Removal of These Records from His Home and a Reply Letter on the Behalf of Sir John Anderson Notifying O'Brien That the Case Will Be Thoroughly Investigated. 1921.