Thomas P. Cullinan, 75, a novelist, playwright and television writer. Cullinan wrote the book "The Beguiled," which later was made into a movie starring Clint Eastwood. The writer's play "Mrs. Lincoln" ran for three months at the Cleveland Play House and was performed in New York, Chicago and other cities. He also wrote a weekly program, "Breakthrough," for Westinghouse-owned KYW Channel 3 that was syndicated on other Westinghouse stations. It dramatized the lives of great scientists and scientific discoveries. The Ford Foundation awarded Cullinan a grant to a symposium in Berlin in 1964. His one-act play, "The Sentinel," was produced there. He received a second Ford grant in 1966 and spent a year at the University of Utah, where his "Madigan's Wedding" was performed. On June 11 in Cleveland Heights, Ohio, of an apparent heart attack.