Darley Arabian
His sire line is extinct, but he made a significant contribution to the Thoroughbred breed. The three traditional foundation sires whose sire lines still exist today were Darley Arabian, Godolphin Arabian and Byerley Turk. However Curwen's Bay Barb contributed significantly to the breed through other lines of descent. Modern Thoroughbred's tend to have most crosses to Godolphin Arabian (contributing 13.8%), then Darley Arabian (6.5%), Curwen's Bay Barb (4.2%) and Byerley Turk (3.3%).