- F ox , ▁ 1 2 th ▁Baron ▁Con y ers , ▁and ▁his ▁wife , ▁Mary ▁Cur te is . ▁Her ▁sister , ▁Hon . ▁Mar cia ▁Lane - F ox , ▁became ▁the ▁Count ess ▁of ▁Y ar borough , ▁and ▁her ▁brother , ▁Hon . ▁S ack ville ▁Fitz roy ▁Henry ▁Lane - F ox , ▁died ▁at ▁age ▁ 1 8 ▁at ▁Dur ban , ▁South ▁Africa . ▁Her ▁pat ernal ▁grand par ents ▁were ▁S ack ville ▁Walter ▁Lane - F ox ▁and ▁Lady ▁Charlotte ▁Mary ▁Anne ▁Georg iana ▁Os bor ne ▁( d augh ter ▁of ▁George ▁Os bor ne , ▁ 6 th ▁Duke ▁of ▁Le eds ). ▁ ▁Bar ony ▁of ▁Dar cy ▁de ▁Kn ay th ▁In ▁ 1 8 8 8 , ▁Lady ▁Pow is ' ▁father ▁died ▁and ▁the ▁Baron ies ▁of ▁Dar cy ▁de ▁Kn ay th ▁and ▁Con y ers ▁fell ▁into ▁ab ey ance ▁between ▁his ▁two ▁daughters . ▁On ▁ 8 ▁June ▁ 1 8 9 2 , ▁the ▁ab ey ance ▁of ▁the ▁Bar ony ▁of ▁Con y ers ▁was ▁terminated ▁in ▁favour ▁of ▁the ▁Count ess ▁of ▁Y ar borough . ▁Ele ven ▁years ▁later , ▁on ▁ 2 9 ▁September ▁ 1 9 0 3 , ▁the ▁Bar ony ▁of ▁F au con berg ▁( a ▁title ▁which ▁had ▁been ▁in ▁ab ey ance ▁since ▁the ▁death ▁of ▁the ▁last ▁holder , ▁the ▁ 6 th ▁Baron ess ▁F au con berg ▁in ▁