Darnley was by Scotland-Fionne, foaled in 1940 at Walnut Hall Farm in Kentucky. As a yearling he was sold for $2,400 to Aaron Williams of Corning, NY and placed in the stable of Walter Cox In Goshen. Upon the death of Cox he was sent to Harry Whitney. At the age of four, he took his record of 1:59¾ in The Trotting Derby at Goshen. When Williams died in 1946, he was willed to Whitney, who sold him to Walnut Hall Farm and immediately placed at stud. He proved to be a wonderful sire, with such off-spring as Lord Steward, Darn Safe, Tag Me and numerous others. He died at Walnut Hall on February 2, 1960.