Power of attorney. Blacktoft (Yorkshire, East Riding). 20 August, 12 Rich. II (1388). . Power of attorney from Gerard de Ufflete, kt, Gerard Sothill, John Kirkeby, and Thomas Spenser to Gilbert de Lincoln and Thomas Sandale to deliver seisin to Richard, son of Robert Haunsard, kt., and Joan his wife, of the manor of Blaktoft.