Fourfold (牝 1916 芦毛 The Tetrarch)
 |-- Empire Builder (牡 1926 芦毛 Son-in-Law)
 |-- Lindos Ojos (牝 1928 芦毛 Buen Ojo)
 |   |-- Jennie (牝 1936 鹿毛 Apelle)
 |   |   `-- Skylarking (牝 1947 鹿毛 Mirza)
 |   |-- Joan (牝 1937 栗毛 Blenheim)
 |   |   |-- Amina (牝 1945 栗毛 Solario)
 |   |   |-- Kerima (牝 1946 鹿毛 Bois Roussel)
 |   |   `-- But Beautiful (牝 1947 栗毛 Tehran)
 |   `-- Linaria (牝 1943 栗毛 Turkhan)
 |       |-- Arctic Line (牝 1953 栗毛 Arctic Prince)
 |       |-- Linear (牝 1956 栗毛 Nearco)
 |       `-- Courting (牝 1957 栗毛 Supreme Court)
 `-- Birchfield (牝 1938 芦毛 Scarlet Tiger)
     `-- Gradient (牝 1948 Turkhan)
         `-- Shiralee (牝 1954 Le Sage)