▁ 1 7 7 8 ▁he ▁was ▁created ▁a ▁Prince ▁of ▁the ▁Holy ▁Roman ▁Empire ▁( Re ich sf ür st ) ▁by ▁the ▁Emperor ▁Joseph ▁II . ▁He ▁was ▁allowed ▁by ▁George ▁III ▁to ▁bear ▁this ▁title ▁in ▁Great ▁Britain . ▁▁ ▁Lord ▁Cow per ' s ▁second ▁son , ▁the ▁fifth ▁Earl ▁( who ▁succeeded ▁on ▁the ▁early ▁death ▁of ▁his ▁un mar ried ▁elder ▁brother ), ▁was ▁a ▁Fellow ▁of ▁the ▁Royal ▁Society . ▁The ▁latter ▁was ▁succeeded ▁by ▁his ▁el dest ▁son , ▁the ▁sixth ▁Earl . ▁He ▁represented ▁Can ter bury ▁in ▁Parliament ▁and ▁served ▁as ▁Lord ▁Lieutenant ▁of ▁Kent . ▁Lord ▁Cow per ▁married ▁the ▁Hon . ▁Anne ▁Florence , ▁daughter ▁of ▁Thomas ▁de ▁Grey , ▁ 2 nd ▁Earl ▁de ▁Grey ▁and ▁ 6 th ▁Baron ▁Lucas . ▁In ▁ 1 8 5 9 ▁she ▁succeeded ▁her ▁father ▁as ▁ 7 th ▁Baron ess ▁Lucas . ▁They ▁were ▁both ▁succeeded ▁by ▁their ▁son , ▁the ▁sevent h ▁Earl ▁and ▁e ighth ▁Baron ▁Lucas . ▁He ▁was ▁a ▁Liberal ▁politician ▁and ▁served ▁as ▁Lord - L ie utenant ▁of ▁Ireland ▁between ▁ 1 8 8 0 ▁and ▁ 1 8 8 2 . ▁In ▁ 1 8 7 1 ▁managed ▁to ▁obtain ▁a ▁revers al ▁of ▁the ▁att ain der ▁of ▁the ▁Scottish ▁Lord ship ▁of ▁D ing wall , ▁which ▁had ▁been ▁under ▁att ain der ▁since ▁ 1 7 1 5 , ▁and ▁became ▁the ▁ 4 th ▁Lord ▁D ing wall ▁as ▁well .