Mrs. Joseph Francis O'Connell, Jr. of Fort Worth, Tx. has announced the engagement of her daughter, Susan Murrin, to Stuart Holmes Johnson, III, son of Mrs. Wynant Davis Vanderpool, Jr. and Mr. Stuart H. Johnson, Jr., and attorney, both of Washington, D.C. A May wedding is planned.

Miss O'Connell, an alumna of the Winsor School in Boston and a graduate of Barnard College, is Account Supervisor at the J. Walter Thompson Company. She is a member of the New York Junior League and the Vincent Club of Boston. Her father, the late Joseph F. O'Connell, Jr., was a Boston attorney. She is the granddaughter of the late Congressman and Mrs. Joseph F. O'Connell of Boston, and of the late Mr. and Mrs. Andrew J. O'Brien of Fort Worth. Mr. Johnson teaches at St. Bernard's School in New York. He attended St. Albans School in this city, was graduated from Phillips Exeter Academy and Yale University, and is a member of the Metropolitan Opera Club and the Coffee House. He is the grandson of Mrs. Richard E. Wheeler of Providence, R.I. and the late Mr. Wheeler and of the late Mr. and Mrs. Stuart H. Johnson of Locust Valley, N.Y.