O'Brien, A. P., Ó Ceallaigh, S. T., Duffy, G. G., Duffy, M. G., Moore, M. G., & Cotter, W. T. (1926). Correspondence between Art O'Brien and Seán T. Ó Ceallaigh concerning his case against the 'Catholic Herald', William Cotter thanking him for his oration at his mother's funeral, George Gavan Duffy relating to ministerial appointments, Margaret Gavan Duffy regarding George Gavan Duffy's health, and Maurice Moore concerning a visit to London.

O'Brien, Art Patrick, et al. Correspondence Between Art O'Brien and Seán T. Ó Ceallaigh Concerning His Case Against the 'Catholic Herald', William Cotter Thanking Him for His Oration at His Mother's Funeral, George Gavan Duffy Relating to Ministerial Appointments, Margaret Gavan Duffy Regarding George Gavan Duffy's Health, and Maurice Moore Concerning a Visit to London. 1926.