▁Ros al ie ▁St ier ▁Cal vert , ▁was ▁published ▁by ▁the ▁Joh ns ▁Hop kins ▁University ▁Press ▁in ▁ 1 9 9 1 . ▁The ▁letters ▁range ▁in ▁date ▁from ▁ 1 7 9 5 ▁to ▁ 1 8 2 1 , ▁and ▁ill uminate ▁the ▁life ▁of ▁the ▁Cal ver ts ' ▁plant ation ▁household ▁during ▁the ▁events ▁leading ▁up ▁to ▁and ▁during ▁the ▁War ▁of ▁ 1 8 1 2 . ▁ ▁Early ▁life ▁ ▁George ▁Cal vert ▁was ▁born ▁at ▁his ▁father ' s ▁plant ation ▁home ▁of ▁Mount ▁Air y , ▁Maryland , ▁on ▁February ▁ 2 , ▁ 1 7 6 8 , ▁the ▁young est ▁son ▁of ▁Bened ict ▁Sw ing ate ▁Cal vert , ▁who ▁was ▁himself ▁the ▁il leg it imate ▁son ▁of ▁Charles ▁Cal vert , ▁ 5 th ▁Baron ▁Baltimore , ▁the ▁pen ult imate ▁Lord ▁Prop ri et or ▁of ▁the ▁Province ▁of ▁Maryland . ▁ ▁R ivers dale ▁ ▁George ▁Cal vert ▁lived ▁at ▁the ▁R ivers dale ▁plant ation , ▁also ▁known ▁as ▁the ▁Cal vert ▁M ansion , ▁a ▁five - part , ▁large - scale ▁late ▁Georg ian ▁m ansion ▁with ▁superior ▁Federal ▁interior , ▁built ▁between ▁ 1 8 0 1 ▁and ▁ 1 8 0 7 . ▁Also ▁known ▁as ▁Baltimore ▁House , ▁Cal vert ▁M ansion ▁or ▁R ivers dale ▁M ansion , ▁it ▁is ▁located ▁at ▁ 4 8 1 1 ▁River dale ▁Road ▁in ▁River dale ▁Park , ▁Maryland . ▁It ▁was