▁American ▁car ved ▁pet rog lyph s ▁of ▁a ▁similar ▁time ▁period ▁and ▁region ▁as ▁the ▁P ias a ▁mon ster ▁are ▁car ved ▁into ▁the ▁rocks ▁at ▁Washington ▁State ▁Park ▁in ▁Missouri ▁about ▁ 6 0 ▁miles ▁south west ▁of ▁the ▁current ▁P ias a ▁image . ▁ ▁The ▁ 1 7 9 7 - 1 7 9 8 ▁map ▁of ▁French ▁expl orer ▁Nicolas ▁De ▁Fin iels ' ▁shows ▁the ▁cl iffs ▁above ▁the ▁P ias a ▁l abeled ▁as ▁Ha ute urs ▁De ▁Pa ill isa ▁( source ▁arch ives ▁Vers a illes , ▁France ▁" Car te ▁d ' une ▁Part ie ▁Du ▁C ours ▁Du ▁Mississippi "). ▁( Part ial ▁source : ▁See ▁Costa ▁ 2 0 0 5 : ▁ 2 9 7 ) ▁ ▁An ▁earlier ▁ 1 7 7 8 ▁map ▁titled ▁" A ▁new ▁map ▁of ▁the ▁western ▁parts ▁of ▁Virginia , ▁Pennsylvania , ▁Maryland ▁and ▁North ▁Carolina ; ▁compreh ending ▁the ▁river ▁Ohio , ▁and ▁all ▁the ▁rivers , ▁which ▁fall ▁into ▁it ; ▁part ▁of ▁the ▁river ▁Mississippi , ▁the ▁whole ▁of ▁the ▁Illinois ▁River , ▁... ▁Author ▁H utch ins , ▁Thomas , ▁ 1 7 3 0 - 1 7 8 9 " ▁clearly ▁shows ▁the ▁place ▁name ▁" PI AS AS " ▁where ▁the ▁present ▁day ▁City ▁of ▁Al ton ▁is ▁located ▁and ▁bounded ▁by ▁the ▁Wood ▁River ▁to ▁the ▁east . ▁( this ▁map ▁is ▁one ▁of ▁the ▁earliest ▁documented ▁references ▁for ▁the ▁word ▁P ias a ).