Old Montagu Mare ( 牝 Lor. d'Arcy's Old Montagu )
 |-- Sister To Mother Western ( 牝 Easby Snake )
 |   `-- Blacklegs Mare ( 牝 Devonshire Blacklegs )
 |   |   `-- Trajan ( 牡 1749 鹿毛 Regulus )
 `-- Mother Western ( 牝 1731 Easby Snake )
 |   |-- Miss Western ( 牝 1746 栗毛 Sedbury )
 |   |   |-- Miss Cranbourne ( 牝 1753 鹿毛 Godolphin Arabian )
 |   |   `-- Bajazet Mare ( 牝 1762 鹿毛 Bajazet )
 |   |-- Spilletta ( 牝 1749 鹿毛 Regulus )
 |   |   |-- Eclipse ( 牡 1764 鹿毛 Marske )
 |   |   |-- Proserpine ( 牝 1766 鹿毛 Marske )
 |   |   `-- Garrick ( 牡 1772 栗毛 Marske )
 |   `-- Rib Mare ( 牝 1751 Rib )
 |   |   |-- Le Sang Mare ( 牝 芦毛 Le Sang )
 |   |   |-- Blank Mare ( 牝 1760 鹿毛 Blank )
 |   |   `-- Le Sang Mare ( 牝 1774 芦毛 Le Sang )