O'Brien, A. P., Markievicz, C. d., McGrath, S., Irish Self-Determination League of Great Britain, & Labour Party. (1923). Material relating to the London Office, including typescript copy letter to Constance Markievicz recommending that she meet British Labour Party MPs, a letter of Seán McGrath on the removal of P. J. Kelly as president of the Irish National Aid Central Distress Fund and a letter on general unemployment in London.

O'Brien, Art Patrick, et al. Material Relating to the London Office, Including Typescript Copy Letter to Constance Markievicz Recommending That She Meet British Labour Party MPs, a Letter of Seán McGrath on the Removal of P. J. Kelly as President of the Irish National Aid Central Distress Fund and a Letter on General Unemployment in London. 1923.