▁mile ▁and ▁" c rown st ones " ▁every ▁, ▁using ▁stone ▁sh ipped ▁from ▁England . ▁The ▁Maryland ▁side ▁says ▁"( M )" ▁and ▁the ▁Del aware ▁and ▁Pennsylvania ▁sides ▁say ▁"( P ) ". ▁Crown st ones ▁include ▁the ▁two ▁co ats ▁of ▁arms . ▁Today , ▁while ▁a ▁number ▁of ▁the ▁original ▁stones ▁are ▁missing ▁or ▁buried , ▁many ▁are ▁still ▁visible , ▁rest ing ▁on ▁public ▁land ▁and ▁protected ▁by ▁iron ▁c ages . ▁ ▁Mason ▁and ▁D ixon ▁confirmed ▁earlier ▁survey ▁work , ▁which ▁del ine ated ▁Del aware ' s ▁southern ▁boundary ▁from ▁the ▁Atlantic ▁Ocean ▁to ▁the ▁" Middle ▁Point " ▁stone ▁( al ong ▁what ▁is ▁today ▁known ▁as ▁the ▁Trans pen ins ular ▁Line ). ▁They ▁proceeded ▁nearly ▁due ▁north ▁from ▁this ▁to ▁the ▁Pennsylvania ▁border . ▁ ▁Later , ▁the ▁line ▁was ▁marked ▁in ▁places ▁by ▁additional ▁benchmark s ▁and ▁survey ▁markers . ▁The ▁lines ▁have ▁been ▁res ur vey ed ▁several ▁times ▁over ▁the ▁centuries ▁without ▁substant ive ▁changes ▁to ▁Mason ' s ▁and ▁D ixon ' s ▁work . ▁The ▁stones ▁may ▁be ▁a ▁few , ▁to ▁a ▁few ▁hundred , ▁feet ▁east ▁or ▁west ▁of ▁the ▁point ▁Mason ▁and ▁D ixon ▁thought ▁they ▁were : ▁in ▁any ▁event , ▁the ▁line ▁drawn ▁from ▁stone ▁to ▁stone ▁forms ▁the ▁legal ▁boundary . ▁ ▁According ▁to ▁Dave ▁Do yle ▁at ▁the ▁National ▁Ge od etic ▁Survey , ▁part ▁of ▁the ▁National ▁Ocean ic ▁and ▁At mos pher ic ▁Administration , ▁the ▁common