▁S ett lement ▁upon ▁her ▁real ms . ▁ ▁In ▁ 1 5 7 0 ▁the ▁pap acy ▁respond ed ▁with ▁the ▁pap al ▁b ull ▁Reg n ans ▁in ▁Ex c els is , ▁which ▁declared ▁Elizabeth ▁to ▁be ▁an ▁il leg it imate ▁us ur per . ▁During ▁this ▁time ▁of ▁religious ▁per sec ution , ▁it ▁was ▁well ▁known ▁that ▁Ball ▁provided ▁" safe ▁houses " ▁for ▁any ▁b ish ops ▁or ▁pri ests ▁who ▁might ▁be ▁passing ▁through ▁Dublin . ▁ ▁Margaret ▁Ball ' s ▁el dest ▁son , ▁Walter , ▁who ▁wanted ▁to ▁follow ▁in ▁his ▁father ' s ▁foot steps ▁and ▁advance ▁his ▁political ▁career , ▁emb rac ed ▁the ▁" new ▁religion " ▁and ▁was ▁appointed ▁Commission er ▁for ▁E cc les iast ical ▁C aus es ▁in ▁ 1 5 7 7 . ▁Margaret ▁was ▁disappoint ed ▁with ▁her ▁son ' s ▁change ▁of ▁faith ▁and ▁tried ▁to ▁change ▁his ▁mind . ▁On ▁one ▁occasion , ▁she ▁told ▁him ▁that ▁she ▁had ▁a ▁" special ▁friend " ▁for ▁him ▁to ▁meet . ▁Walter ▁arrived ▁early ▁with ▁a ▁company ▁of ▁soldiers , ▁and ▁found ▁that ▁the ▁" special ▁friend " ▁was ▁D erm ot ▁O ' H ur ley , ▁Arch bishop ▁of ▁C ash el . ▁He ▁was ▁celebr ating ▁Mass ▁with ▁the ▁family . ▁ ▁Im medi ately ▁after ▁his ▁installation ▁as ▁Lord ▁Mayor ▁of ▁Dublin ▁in ▁ 1 5 8 0 , ▁Walter ▁had ▁his ▁mother ▁and ▁her ▁personal ▁chap lain ▁arrested ▁and