▁be ▁led ▁by ▁a ▁woman : ▁Sarah ▁M ull ally , ▁Bishop ▁of ▁Cred it on , ▁ord ained ▁two ▁de a cons ▁as ▁pri ests . ▁ ▁List ▁of ▁vic ars ▁ ▁Ward ens ▁of ▁St ▁Mary ' s ▁college ▁ ▁Vic ars ▁of ▁the ▁parish ▁church ▁ ▁Astronom ical ▁clock ▁ ▁The ▁south ▁tr anse pt ▁( bell ▁tower ) ▁houses ▁the ▁Ot tery ▁St ▁Mary ▁astronom ical ▁clock , ▁one ▁of ▁the ▁oldest ▁surv iving ▁mechanical ▁clock s ▁in ▁the ▁country . ▁It ▁is ▁commonly ▁attributed ▁to ▁Bishop ▁John ▁de ▁Grand isson , ▁who ▁was ▁Bishop ▁of ▁Ex eter ▁( 1 3 2 7 – 6 9 ) ▁and ▁ad her es ▁to ▁P to le ma ic ▁cosm ology ▁with ▁the ▁Earth ▁at ▁the ▁centre ▁of ▁the ▁solar ▁system . ▁ ▁The ▁clock ▁was ▁restored ▁to ▁working ▁condition ▁in ▁ 1 9 0 7 . ▁ ▁Organ ▁ ▁The ▁church ▁has ▁had ▁org ans ▁since ▁at ▁least ▁the ▁ 1 4 th ▁century , ▁as ▁they ▁are ▁mentioned ▁in ▁Bishop ▁Grand isson ’ s ▁stat ues ▁for ▁the ▁foundation ▁of ▁the ▁colleg iate ▁church . ▁By ▁the ▁time ▁the ▁college ▁was ▁dissol ved ▁in ▁ 1 5 4 5 , ▁there ▁were ▁three ▁org ans , ▁but ▁whatever ▁org ans ▁surv ived ▁into ▁the ▁ 1 7 th ▁century ▁were ▁destroyed ▁in ▁ 1 6 4 5 ▁during ▁the ▁English ▁Civil ▁War . ▁ ▁Ar ound ▁ 1 8 2 8 , ▁Fl ight ▁and ▁Rob son ▁provided ▁a