WALTER MACKEN and his blonde young wife live their country life on the west coast of Ireland, and when in Dublin are to be found in the neighborhood of the Abbey Theatre, where he is one of the leading dramatists and actors. He is the author of two plays and three novels — the third. Rain on the Wind (Macmillan), being the May selection of the Literary Guild. Mr. Macken writes with a native exuberance; and despite the pressure of Eire’s censorship, he feels that Irish writers will find their best themes and do their best work if their roots are in home soil. Sean O’Faolain and Mary Lavin are two other Atlantic contributors who are with him in this.