Letters to Mark Grantham from assorted friends, associates and radio listeners, concerning social and business matters, with particular reference to his work as a scriptwriter on the Radio Éireann serial 'The Kellys of Castleross'. Includes letters from Mark Boden of O'Kennedy-Brindley Advertising, Bill Nugent, Eric Ferguson of Sylvia Milson Publicity, London, Donal Donnelly (maily relating to the Dublin and London theatre scenes), J.F. Young of R. Wilson Young Ltd. Advertising, Edwin McEvoy, J.W. Preston Hoblyn of Irish International Advertising, and radio listeners Ria Dillon, Kitty Walshe, F. Roderick and Mary Gaffney. Letters date from 7 March 1955 to January 1973.