)A skilled debater and politician, he was twice Speaker of the House of Commons during the Cavalier Parliament, the first non-lawyer to be chosen for that position for a considerable time.Seymour was a signatory to “The Several Declarations of The Company of Royal Adventurers of England Trading into Africa.” This document was published in 1667 by the Royal African Company, a corporation which attempted to monopolize the slave trade in England starting in the late 1660s.