The English Harcourt branch entered the English peerage, as barons then viscounts then earls. Marquesses, earls and viscounts are commonly also addressed as Lord. Coronets for viscounts have 16 silver balls, of which seven are displayed. The two viscounts died without male heirs, extinguishing their titles. Air Rhodesia, meanwhile, began developing shielding for its Viscounts. There are now two Viscounts in Terralba. VISCOUNTS every sixty minutes all day long! For examples of fictional viscounts and viscountesses, see List of fictional nobility#Viscounts and viscountesses. By 1958 TCA had an operational fleet of 51 Viscounts. The Plunketts also intermarried with the Prestons, Viscounts Gormanston. Subsequently, Capital Airlines went on to order 60 British Vickers Viscounts. By 1958, BEA had 77 Viscounts in service. In 1960 three Vickers Viscounts were ordered on 20 April. Ury House, Stonehaven, is the ancestral seat of the Viscounts Stonehaven. His total flying time was 6,683 hours, 1,679 of them on Viscounts.