▁ 1 6 8 7 ▁M . D . ▁He ▁pract ised ▁in ▁North am pton ; ▁and ▁in ▁ 1 6 9 3 ▁or ▁ 1 6 9 4 ▁settled ▁in ▁Lomb ard ▁Street , ▁London , ▁having ▁to ▁leave ▁North am pton ▁in ▁consequence ▁of ▁imm or ality , ▁according ▁to ▁Thomas ▁H ear ne . ▁Cow ard ▁left ▁London ▁about ▁ 1 7 0 5 , ▁and ▁in ▁ 1 7 1 8 ▁was ▁res iding ▁at ▁I ps wich , ▁wh ence ▁in ▁ 1 7 2 2 ▁he ▁wrote ▁to ▁Sir ▁Hans ▁Slo ane , ▁offering ▁to ▁submit ▁an ▁ep it aph ▁upon ▁the ▁Duke ▁of ▁Mar l borough ▁to ▁the ▁duch ess , ▁who ▁was ▁said ▁to ▁have ▁offered ▁ 5 0 0 l . ▁for ▁such ▁a ▁performance . ▁He ▁was ▁admitted ▁a ▁candidate ▁of ▁the ▁College ▁of ▁Sur ge ons ▁on ▁ 5 ▁July ▁ 1 6 9 5 , ▁and ▁remained ▁in ▁that ▁position ▁till ▁ 1 7 2 5 , ▁when ▁the ▁absence ▁of ▁his ▁name ▁from ▁the ▁lists ▁proves ▁that ▁he ▁must ▁have ▁been ▁dead . ▁ ▁Cont ro vers ial ▁writ ings ▁In ▁ 1 7 0 2 ▁Cow ard ▁published , ▁under ▁the ▁pseud onym ▁" Est ib ius ▁Psych ale thes ", ▁Second ▁Th ought s ▁concerning ▁Human ▁Soul , ▁demonstr ating ▁the ▁notion ▁of ▁human ▁soul ▁as ▁believed ▁to ▁be ▁a ▁spiritual , ▁imm ort al ▁subst ance ▁un ited ▁to ▁a ▁human ▁body ▁to ▁be ▁a ▁plain