Fortress (牝 1836 鹿毛 Defence)
 |-- Glacis (牝 1840 栗毛 Bolero)
 |   `-- Esplanade (牝 1847 鹿毛 Cotherstone)
 |       `-- Quickstep (牝 1853 鹿毛 Lugar)
 |-- Delapre (牡 1841 鹿毛 Bolero)
 |-- Old England (牡 1842 鹿毛 Mulatto)
 |-- Pyrrhus the First (牡 1843 栗毛 Epirus)
 `-- Triangle (牝 1849 鹿毛 Epirus)
     |-- Marseillaise (牝 1856 鹿毛 Bay Middleton)
     |   `-- Annie Bland (牝 1869 栗毛 King John)
     `-- Touch Me Not (牝 1858 鹿毛 Touchstone)
         `-- Tangible (牡 1870 栗毛 Blair Athol)