Contains, for the most park, business letters to Mark Grantham from the Dublin based advertising agency Arks Ltd. and from Radio Eireann, relating to Grantham's scripting of the radio serial 'The Kellys of Castleross'. Also included are some further letters from other advertising and publicity agencies in Dublin and London, radio listeners of the serial 'The Kellys of Castleross' and from Grantham's friends, which touch on social and personal matters, including the Dublin and London theatre scenes and RTÉ's eventual axing of the serial.