descendants of Gravitation xx

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stallion Tractor xx (Thoroughbred, 1918, from The Tetrarch xx)

Tractor xx
gender-male
1918

The Tetrarch xx / Saint Simon xx

broodmare Lady Carnot xx (Thoroughbred, 1913, from Radium xx)

Lady Carnot xx
gender-female
1913

Radium xx / Saint Simon xx

broodmare Oration xx (Thoroughbred, 1912, from Cicero xx)

Oration xx
gender-female
1912

Cicero xx / Saint Simon xx