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Excerpt on Pocohantas:
She'd shown some class, but in her nine starts, she'd been unable to win. Pocahontas may have been run over her head, but it may also be that her ability was compromised by being a "roarer," or "broken in the wind." This is a respiratory problem that in this case may have been passed down through the female line for at least three generations, as both Marpessa and her dam Clare were also said to be roarers.
Her son Stockwell:
Although he did not exhibit the family tendency to become a "roarer," Stockwell had a reputation for siring more than a few horses with wind problems.