ting ▁his ▁studies ▁he ▁received ▁a ▁place ▁as ▁a ▁law ▁cl erk ▁in ▁ 1 8 1 8 ▁in ▁the ▁Pr uss ian ▁civil ▁service . ▁From ▁ 1 8 2 4 , ▁his ▁career ▁led ▁him ▁from ▁the ▁post ▁of ▁Reg ierungs rat ▁and ▁legal ▁ad visor ▁in ▁C ologne ▁to ▁that ▁of ▁Ober reg ierungs rat ▁ 1 8 2 9 ▁in ▁König s berg ▁und ▁Mer se burg . ▁He ▁was ▁then ▁made ▁" reg ional ▁president " ▁( Reg ierungs präsident ) ▁in ▁T rier ▁in ▁ 1 8 3 4 , ▁and ▁six ▁years ▁later ▁Karl ▁vom ▁Stein ▁zum ▁Al ten stein ▁appointed ▁him ▁to ▁the ▁min istry ▁for ▁education ▁and ▁cultural ▁affairs ▁and ▁as ▁member ▁of ▁the ▁Pr uss ian ▁Council ▁of ▁State ▁in ▁Berlin . ▁ ▁When ▁Al ten stein ▁died ▁on ▁ 1 4 ▁May ▁ 1 8 4 0 , ▁L aden berg ▁was ▁entr usted ▁with ▁the ▁latter ' s ▁political ▁respons ib ilities ▁in ▁a ▁prov is ional ▁capacity ▁until ▁ 8 ▁October . ▁From ▁the ▁ 2 2 ▁October ▁he ▁took ▁up ▁this ▁position ▁perman ently ▁and ▁from ▁that ▁day ▁on wards ▁led ▁the ▁department ▁for ▁religious ▁Protest ant , ▁education ▁and ▁health ▁affairs ▁in ▁the ▁min istry ▁of ▁Johann ▁Al bre cht ▁Friedrich ▁von ▁E ich horn . ▁In ▁ 1 8 4 1 ▁he ▁also ▁received ▁the ▁role ▁of ▁extraordinary ▁government ▁commission er ▁at ▁the ▁H umb old t ▁University ▁of ▁Berlin . ▁ ▁When ▁E ich horn ▁res