Flash of Steel (牝 1913 黒鹿毛 Royal Realm)
 |-- Line of Fire (牝 1918 鹿毛 White Eagle)
 |   `-- Fireship (牝 1926 鹿毛 Swynford)
 |       `-- Firefall (牝 1937 黒鹿毛 Dastur)
 |-- Sword Play (牝 1921 鹿毛 Great Sport)
 |   |-- Challenger (牡 1927 鹿毛 Swynford)
 |   |-- Thrustaway (牝 1933 鹿毛 Fairway)
 |   |   `-- Wood Free (牝 1942 鹿毛 Bois Roussel)
 |   |-- Thrust (牝 1936 鹿毛 Fairway)
 |   |   |-- Jollification (牝 1943 鹿毛 Bois Roussel)
 |   |   `-- エスグリマ Esgrima [英] (牝 1954 鹿毛 Donatello)
 |   `-- Sword Knot (牝 1939 鹿毛 Trimdon)
 |       |-- Trinity (牡 1944 鹿毛 Stardust)
 |       |-- Bowknot (牝 1946 黒鹿毛 Nearco)
 |       `-- Brown Copy (牝 1951 Fair Copy)
 |-- Persuasion (牝 1923 芦毛 Roi Herode)
 |   `-- Andrea (牡 1929 鹿毛 Solario)
 |-- Silver Steel (牝 1925 鹿毛 Silvern)
 |   `-- Silver Loan (牝 1940 鹿毛 Loaningdale)
 |       `-- Dollar Crisis (牝 1946 鹿毛 Pink Flower)
 `-- Spionetta (牝 1927 栗毛 Spion Kop)
     `-- Night Spi (牝 1931 鹿毛 Night Raid)
         |-- Fox Spi (牝 1940 青毛 Foxbridge)
         |-- Glow-worm (牝 1950 栗毛 Columcille)
         `-- Floral Silk (牝 1954 芦毛 Moorcock)