Cooks Vixen (牝 Helmsley Turk)
 `-- Old Child Mare (牝 Gresleys Bay Arabian)
     |-- Darley Arabian Mare (牝 Darley Arabian)
     |   `-- Rattle Mare (牝 1725 Rattle)
     |-- Young Child Mare (牝 Burdetts Arabian)
     |   `-- Kitty Burdett (牝 Darley Arabian)
     `-- Blue Eyed Susan (牝 Rattle)
         `-- Diamond Mare (牝 North Country Diamond)