8 2 0 ), ▁and ▁others . ▁Some ▁later ▁ed itions ▁spell ▁the ▁last ▁name ▁as ▁" J oh on not ." ▁ ▁External ▁evidence ▁for ▁the ▁existence ▁of ▁“ Jack son ▁Joh on net ” ▁is ▁lack ing . ▁The ▁family ▁does ▁not ▁appear ▁in ▁the ▁ 1 7 9 0 ▁census ▁for ▁Fal mouth , ▁Maine ▁( then ▁part ▁of ▁Massachusetts ); ▁nor ▁has ▁any ▁trace ▁of ▁“ Jack son ▁Joh on net ,” ▁other ▁than ▁the ▁printed ▁narr ative , ▁been ▁found . ▁In ternal ▁evidence ▁within ▁the ▁Rem ark able ▁Advent ures ▁suggests ▁that ▁the ▁entire ▁narr ative ▁is ▁an ▁in vention , ▁based ▁in ▁part ▁upon ▁published ▁reports ▁of ▁the ▁battle ▁it ▁describes ▁( known ▁generally ▁as ▁the ▁Battle ▁of ▁the ▁W ab ash ). ▁The ▁chron ology ▁and ▁ge ography ▁of ▁the ▁narr ative ▁contain ▁several ▁points ▁that ▁contradict ▁the ▁known ▁facts : ▁ 1 . ▁General ▁Jos iah ▁Harm ar ▁had ▁been ▁rel ieved ▁of ▁command ▁of ▁the ▁western ▁army ▁in ▁March ▁ 1 7 9 1 ▁( before ▁Joh on net ▁left ▁Fal mouth ); ▁ 2 . ▁Fort ▁Jefferson ▁was ▁not ▁constructed ▁until ▁October ▁ 1 7 9 1 ▁( although ▁the ▁narr ator ▁claims ▁to ▁have ▁arrived ▁there ▁September ▁ 1 8 ); ▁and ▁ 3 . ▁the ▁site ▁of ▁Br add ock ' s ▁defeat , ▁near ▁present - day ▁Pitts burgh , ▁PA , ▁is ▁roughly ▁ 2 7 5 ▁miles ▁east ▁of ▁the ▁site ▁of ▁Fort ▁Jefferson ▁( near ▁present