This quote by Tim Vine is a referral to the novel Black Beauty by Anna Sewell. The book is about a horse called Black Beauty and his life experiences. The expression "dark horse" is typically used to describe someone or something that is unexpected or unexpected. In this case, it is utilized to explain Black Beauty, the horse from the novel. The phrase implies that Black Beauty is an unanticipated or unexpected character, which his story has plenty of unanticipated twists and turns. It also suggests that Black Beauty is a strong and effective character, regardless of his dark color. The quote is a clever way of referencing the novel and its main character, and it likewise functions as a tip that life has plenty of surprises.
"Give these Indians little farms, survey them, let them put fences around them, let them have their own horses, cows, sheep, things that they can call their own, and it will do away with tribal Indians"