%0 Manuscript %A Ó Ceallaigh, Seán T. (Seán Tomás), 1882-1966 %E O'Brien, William, 1881-1968 %D 1915 %G English %T Letter from Sean T. O Ceallaigh to William O'Brien inviting him to attend a meeting in order "to form a committee to organise a public meeting of protest against imprisonment of Irish Volunteers",