A son, Christopher Lincklaen Ledyard, weighing 6 pounds, 13 ounces., born to Mr. and Mrs. Robert Ledyard of Fayetteville on Tuesday, March 10, 1964, in St. Joseph's Hospital, Syracuse. Mrs. Ledyard is the former Eileen Smythe, daughter of Mrs.' Kathleen Smythe formerly of Cazenovia and new living in Santa Monica. Calif.