The courts of Brodhull and Guestling were established to protect the privileges of the Cinque Ports by the portsmen themselves. From the 15th century these courts had been largely replaced by the Lord Warden's Court at Dover. From the 16th century the principal business of the courts was the installation of the Lord Warden and the court is now only occasionally summoned. The office continued to be a powerful one. In 1550 the Mayor and Jurats of Dover refused to accept a Royal Writ because it was not accompanied by a letter of attendance from the Lord Warden. The member ports' parliamentary representatives were appointed by the Lord Warden at first; this influence continued until the 19th century.