▁in ▁medicine ▁at ▁She ff ield ▁School ▁of ▁Medicine ▁and ▁St ▁Bar th ol ome w ' s ▁Hospital ▁in ▁London . ▁His ▁education ▁was ▁expensive ▁for ▁his ▁family , ▁and ▁he ▁ins isted ▁on ▁re - pay ing ▁his ▁parents ▁once ▁he ▁had ▁begun ▁his ▁career . ▁ ▁In ▁ 1 8 9 2 , ▁Add ison ▁graduated ▁from ▁the ▁University ▁of ▁London ▁as ▁a ▁Bach elor ▁of ▁Medicine ▁and ▁Science ▁with ▁hon ours ▁in ▁for ens ic ▁medicine . ▁A ▁year ▁later ▁he ▁qualified ▁as ▁a ▁Medical ▁Doctor ▁and ▁two ▁years ▁after ▁that ▁he ▁was ▁elected ▁a ▁Fellow ▁of ▁the ▁Royal ▁College ▁of ▁Sur ge ons . ▁He ▁combined ▁private ▁practice ▁with ▁academic ▁research , ▁and ▁taught ▁an atom y ▁at ▁She ff ield ▁School ▁of ▁Medicine . ▁In ▁ 1 8 9 6 ▁he ▁became ▁professor ▁of ▁an atom y ▁at ▁the ▁newly ▁formed ▁University ▁College ▁of ▁She ff ield , ▁and ▁edited ▁the ▁Qu arter ly ▁Medical ▁Journal ▁from ▁ 1 8 9 8 ▁to ▁ 1 9 0 1 . ▁In ▁ 1 9 0 1 , ▁he ▁moved ▁to ▁London ▁again , ▁teaching ▁at ▁Char ing ▁Cross ▁Hospital . ▁He ▁published ▁his ▁research ▁on ▁an atom y ▁and ▁became ▁Hunter ian ▁professor ▁with ▁the ▁Royal ▁College ▁of ▁Sur ge ons . ▁ ▁Add ison ' s ▁principal ▁contributions ▁to ▁an atom y ▁were ▁in ▁his ▁writ ings ▁in ▁three ▁volumes ▁of ▁the ▁Journal ▁of ▁An atom y , ▁ 1 8 9 9 – 1 9 0