▁there ▁was ▁a ▁strongly ▁flow ing ▁fresh ▁water ▁spring ▁which ▁only ▁d ried ▁up ▁later ▁when ▁the ▁Se vern ▁T unnel ▁was ▁built . ▁Alternatively , ▁the ▁court ▁may ▁have ▁been ▁based ▁at ▁nearby ▁Sud bro ok . ▁ ▁Port ske w ett ▁is ▁mentioned ▁in ▁ancient ▁Wel sh ▁stories ▁as ▁one ▁of ▁the ▁three ▁chief ▁ports ▁of ▁Wales . ▁A ▁Wel sh ▁poem ▁of ▁around ▁the ▁ 7 th ▁century , ▁M oli ant ▁Cad wall on , ▁describes ▁it ▁as ▁" be aut iful ▁P orth ▁Es ge win , ▁the ▁est u ary ▁on ▁the ▁border ", ▁and ▁the ▁medieval ▁Wel sh ▁phrase ▁meaning ▁from ▁one ▁end ▁of ▁the ▁country ▁to ▁another ▁transl ates ▁as ▁" from ▁P orth ▁Wy gy r ▁to ▁Port ske w ett ". ▁The ▁har bour ▁later ▁s ilt ed ▁up . ▁ ▁It ▁is ▁now ▁a ▁mar sh y ▁area ▁at ▁C ald ic ot ▁P ill , ▁close ▁to ▁the ▁Second ▁Se vern ▁Cross ing ▁and ▁industrial ▁sites , ▁and ▁crossed ▁by ▁power ▁c ables ▁and ▁railway ▁lines , ▁including ▁the ▁entrance ▁to ▁the ▁Se vern ▁T unnel . ▁Arch ae ological ▁investig ations ▁have ▁revealed ▁wet land ▁structures , ▁including ▁fish ▁tra ps , ▁with ▁dates ▁from ▁the ▁ 6 th ▁century ▁on wards . ▁ ▁The ▁tradition ▁of ▁" K ing ▁Harold ' s ▁Palace " ▁The ▁une ven ▁ground ▁south ▁of ▁the ▁village ▁church ▁is ▁shown ▁on ▁some ▁older ▁maps ▁as ▁" Har old ’ s ▁Field ". ▁ ▁According