▁morning ▁of ▁ 2 ▁February ▁ 1 6 8 5 , ▁and ▁died ▁aged ▁ 5 4 ▁at ▁ 1 1 : 4 5   am ▁four ▁days ▁later ▁at ▁White hall ▁Palace . ▁The ▁sudden ness ▁of ▁his ▁ill ness ▁and ▁death ▁led ▁to ▁susp icion ▁of ▁poison ▁in ▁the ▁minds ▁of ▁many , ▁including ▁one ▁of ▁the ▁royal ▁do ctors ; ▁however , ▁a ▁more ▁modern ▁medical ▁analysis ▁has ▁held ▁that ▁the ▁sympt oms ▁of ▁his ▁final ▁ill ness ▁are ▁similar ▁to ▁those ▁of ▁u ra emia ▁( a ▁clin ical ▁synd rome ▁due ▁to ▁kid ney ▁d ys function ). ▁Charles ▁had ▁a ▁labor atory ▁among ▁his ▁many ▁interests , ▁where ▁prior ▁to ▁his ▁ill ness ▁he ▁had ▁been ▁experiment ing ▁with ▁mer cur y . ▁Mercur ic ▁poison ing ▁can ▁produce ▁irre vers ible ▁kid ney ▁damage ; ▁however , ▁the ▁case ▁for ▁this ▁being ▁a ▁cause ▁of ▁his ▁death ▁is ▁un pro ven . ▁In ▁the ▁days ▁between ▁his ▁collapse ▁and ▁his ▁death , ▁Charles ▁end ured ▁a ▁variety ▁of ▁tort ur ous ▁treat ments ▁including ▁blood lett ing , ▁p urg ing ▁and ▁cu pping ▁in ▁hopes ▁of ▁effect ing ▁a ▁recovery . ▁ ▁On ▁his ▁death bed ▁Charles ▁asked ▁his ▁brother , ▁James , ▁to ▁look ▁after ▁his ▁mist ress es : ▁" be ▁well ▁to ▁Port sm outh , ▁and ▁let ▁not ▁poor ▁Nel ly ▁star ve ". ▁He ▁told ▁his ▁cour ti ers , ▁" I ▁am ▁sorry , ▁gentlemen , ▁for ▁being ▁such