▁it ▁hit ▁" the ▁beginning ▁of ▁the ▁for ti eth ▁degree ▁of ▁Northern ▁latitude ." ▁From ▁there ▁the ▁boundary ▁was ▁to ▁follow ▁the ▁for ti eth ▁parallel ▁due ▁west ▁for ▁five ▁degrees ▁of ▁longitude . ▁But ▁the ▁for ti eth ▁parallel ▁does ▁not , ▁in ▁fact , ▁intersect ▁the ▁ 1 2 - mile ▁circle , ▁instead ▁lying ▁significantly ▁farther ▁north . ▁Thus ▁Pennsylvania ' s ▁southern ▁boundary ▁as ▁defined ▁in ▁its ▁char ter ▁was ▁contradict ory ▁and ▁unclear . ▁The ▁most ▁serious ▁problem ▁was ▁that ▁the ▁Maryland ▁claim ▁would ▁put ▁Philadelphia , ▁the ▁major ▁city ▁in ▁Pennsylvania , ▁within ▁Maryland . ▁ ▁The ▁dispute ▁was ▁peace fully ▁resolved ▁in ▁ 1 7 6 7 ▁when ▁the ▁boundary ▁was ▁fixed ▁as ▁follows : ▁▁ ▁Between ▁Pennsylvania ▁and ▁Maryland : ▁ ▁The ▁parallel ▁( lat itude ▁line ) ▁ ▁south ▁of ▁the ▁then ▁southern most ▁point ▁in ▁Philadelphia , ▁measured ▁to ▁be ▁at ▁about ▁ 3 9 ° 4 3 ′ ▁N ▁and ▁agreed ▁upon ▁as ▁the ▁Maryland – P en nsylvan ia ▁line . ▁ ▁Between ▁Del aware ▁and ▁Maryland : ▁ ▁The ▁existing ▁east – west ▁trans pen ins ular ▁line ▁from ▁the ▁Atlantic ▁Ocean ▁to ▁the ▁Ch es ape ake ▁Bay , ▁as ▁far ▁as ▁its ▁mid point ▁from ▁the ▁Atlantic . ▁ ▁A ▁ 1 2 - mile ▁( radius ) ▁circle ▁() ▁around ▁the ▁city ▁of ▁New ▁Castle , ▁Del aware . ▁ ▁A ▁" t ang ent ▁line " ▁connecting ▁the ▁mid point ▁of ▁the ▁trans pen ins