▁Mu ▁( 1 9 2 6 ), ▁The ▁Children ▁of ▁Mu ▁( 1 9 3 1 ), ▁and ▁The ▁Cos mic ▁Forces ▁of ▁Mu ▁( 1 9 3 6 ) ▁which , ▁" equ aled , ▁and ▁often ▁sur pass ed , ▁the ▁b izar re ▁nature ▁of ▁Le ▁Pl on geon ' s ▁writing ." ▁However , ▁James ▁Church ward ▁re located ▁the ▁location ▁of ▁the ▁lost ▁continent ▁of ▁Mu ▁to ▁the ▁Pacific ▁Ocean . ▁ ▁Crit ic ism ▁August us ▁Le ▁Pl on geon ▁was ▁not ▁a ▁trained ▁arch ae ologist , ▁but ▁neither ▁were ▁many ▁of ▁his ▁pe ers . ▁ ▁He ▁did ▁contribute ▁a ▁great ▁deal ▁of ▁arch ae ological ▁data ▁in ▁the ▁form ▁of ▁photograph s ▁and ▁m olds ▁of ▁ru ins ▁and ▁artifact s ▁from ▁U x mal ▁and ▁Ch ichen ▁It za . ▁However , ▁during ▁the ▁late ▁ 1 8 0 0 s ▁arch ae ology ▁was ▁beginning ▁to ▁develop ▁more ▁rig orous ▁scientific ▁standards ▁and ▁Le ▁Pl on geon ▁cl ashed ▁with ▁most ▁of ▁his ▁contempor aries . ▁ ▁Henry ▁Chap man ▁Mer cer , ▁an ▁American ▁arch ae ologist ▁and ▁Cur ator ▁of ▁American ▁and ▁Pre histor ic ▁Ar che ology ▁in ▁the ▁early ▁ 1 8 9 0 s , ▁stated ▁that ▁he ▁had ▁" dis cover ed ▁no ▁proof ▁for ▁Le ▁Pl on geon ' s ▁start ling ▁dedu ctions ▁as ▁to ▁the ▁age ▁of ▁the ▁May as ▁and ▁their ▁migr ations , ▁but ▁rather ▁the ▁contrary ." ▁Edward ▁Herbert ▁Thompson