Thomas de Greystoke obtained a royal charter, 29th Henry III [1245], to hold a weekly market and yearly fair. This Thomas m. Christian, dau. of Roger de Viteripont, the first of that name of Appleby Castle, and was s. by his son, Robert de Greystoke. [Sir Bernard Burke, Dormant and Extinct Peerages, Burke's Peerage, Ltd, London, 1883, p. 254, Greystock, Barons Greystock]