▁Cal vert ▁of ▁R ivers dale , ▁Bl ad ens burg , ▁Maryland , ▁the ▁cont ests ▁were ▁moved ▁to ▁Mer id ian ▁Hill , ▁south ▁of ▁Columbia ▁Road ▁between ▁Four teenth ▁and ▁Six teenth ▁Stre ets , ▁and ▁were ▁conducted ▁at ▁the ▁Hol m st ead ▁Farm ' s ▁one ▁mile ▁o val ▁track . ▁ ▁References ▁ ▁Call c ott , ▁Margaret ▁Law , ▁p . 3 9 0 , ▁M ist ress ▁of ▁R ivers dale : ▁The ▁Plant ation ▁Let ters ▁of ▁Ros al ie ▁St ier ▁Cal vert ▁Retrieved ▁August ▁ 2 0 1 0 ▁ ▁Notes ▁ ▁Gallery ▁ ▁External ▁links ▁Cal vert ▁Family ▁Tree ▁Retrieved ▁Jul ▁ 1 0 ▁ 2 0 1 3 ▁R ivers dale ▁website ▁Retrieved ▁October ▁ 2 0 1 0 ▁R ivers dale ▁information ▁from ▁Prince ▁George ' s ▁County ▁De pt . ▁of ▁Park s ▁& ▁Rec re ation ▁Retrieved ▁October ▁ 2 0 1 0 ▁, ▁including ▁photo ▁in ▁ 2 0 0 3 , ▁at ▁Maryland ▁Historical ▁Trust . ▁Retrieved ▁October ▁ 2 0 1 0 ▁ ▁* ▁Category : 1 8 3 8 ▁death s ▁Category : 1 7 6 8 ▁birth s ▁Category : Pe ople ▁from ▁Mount ▁Air y , ▁Maryland <0x0A> </s> ▁Gil ▁M ały ▁ ▁() ▁is ▁a ▁village ▁in ▁the ▁administrative ▁district ▁of ▁G mina ▁Mi ł om ł yn , ▁within ▁O str ó da ▁County , ▁W arm ian - M as ur ian ▁Vo iv odes hip , ▁in