descendants of True Briton mare

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stallion Old Briton Comet (Hackney (horse/pony), 1859, from Trotting Comet)

Old Briton Comet
gender-male
1859

Trotting Comet / True Briton

stallion Young Rainbow (Hackney (horse/pony), 1874, from Thomas' Rainbow)

Young Rainbow
gender-male
1874

Thomas' Rainbow / True Briton