▁in ▁Ch el ten ham . ▁He ▁was ▁also ▁architect ▁to ▁the ▁London , ▁Oxford ▁and ▁Ch el ten ham ▁Railway ▁Company . ▁Between ▁ 1 8 4 2 ▁and ▁ 1 8 4 8 , ▁when ▁he ▁started ▁a ▁London ▁office ▁at ▁ 1 4 ▁White hall ▁Place , ▁he ▁built ▁up ▁a ▁very ▁large ▁practice ▁in ▁the ▁English ▁mid lands . ▁On ▁starting ▁the ▁London ▁office , ▁a ▁move ▁probably ▁prompt ed ▁by ▁his ▁growing ▁reputation ▁and ▁more ▁specifically ▁by ▁winning ▁the ▁competition ▁to ▁design ▁the ▁ 2 nd ▁M idd les ex ▁County ▁As yl um ▁which ▁became ▁known ▁as ▁the ▁Col ney ▁H atch ▁L un atic ▁As yl um , ▁the ▁Gl ouc ester ▁practice ▁took ▁into ▁partners hip ▁James ▁Med land ▁( 1 8 0 8 – 9 4 ), ▁who ▁had ▁been ▁a ▁fellow ▁pup il ▁of ▁D au kes ▁in ▁P rit ch ett ' s ▁office ▁in ▁York , ▁and ▁changed ▁its ▁name ▁to ▁Hamilton ▁& ▁Med land . ▁In ▁about ▁ 1 8 5 0 , ▁Hamilton ▁em igr ated ▁to ▁New ▁York . ▁▁▁ ▁His ▁early ▁practice ▁would ▁appear ▁to ▁have ▁been ▁assist ed ▁by ▁his ▁family ' s ▁connections , ▁and ▁a ▁link ▁with ▁his ▁future ▁patron , ▁Lord ▁Ward , ▁is ▁provided ▁by ▁his ▁uncle , ▁Richard ▁Dav ies , ▁who ▁was ▁Lord ▁Ward ' s ▁min ing ▁agent . ▁His ▁family ' s ▁good ▁financial ▁standing ▁no ▁doubt ▁also ▁enabled ▁him ▁to ▁purchase ▁the ▁Park ▁estate ▁in ▁Ch el