▁C airo ok ▁agreed ▁to ▁esc ort ▁the ▁group ▁across ▁the ▁territory ▁of ▁the ▁P ai ute ▁to ▁the ▁Old ▁Spanish ▁Tra il ▁that ▁would ▁take ▁them ▁to ▁southern ▁California . ▁German ▁artist ▁Bal du in ▁M öll hausen ▁accompanied ▁the ▁Wh ipp le ▁expedition , ▁and ▁made ▁draw ings ▁of ▁several ▁Moh ave , ▁including ▁I rat aba . ▁M öll hausen ' s ▁draw ings ▁were ▁featured ▁in ▁I ves ' ▁ 1 8 6 1 ▁con gression al ▁report , ▁making ▁I rat aba ▁" am ong ▁the ▁first ▁named ▁li ken esses ▁of ▁California ▁Indians ▁ever ▁published ". ▁ ▁I ves ▁Ex ped ition ▁In ▁February ▁ 1 8 5 8 , ▁I ves ▁returned ▁to ▁the ▁area ▁in ▁a ▁p addle ▁ste amer ▁named ▁Explorer . ▁He ▁was ▁leading ▁an ▁expedition ▁up ▁the ▁Colorado ▁from ▁the ▁south , ▁and ▁he ▁wanted ▁I rat aba ▁to ▁guide ▁them . ▁The ▁Moh ave ▁gave ▁permission ▁to ▁navigate ▁the ▁river , ▁and ▁C airo ok , ▁I rat aba , ▁and ▁a ▁ 1 6 - year - old ▁Moh ave ▁boy ▁named ▁N ah v ah ro op a ▁joined ▁them . ▁M öll hausen ▁again ▁accompanied ▁the ▁expedition , ▁and ▁was ▁im pressed ▁with ▁the ▁Moh ave ▁gu ides , ▁later ▁not ing ▁I rat aba ' s ▁enthus i astic ▁hand sh ake ▁and ▁l ament ing ▁that ▁their ▁only ▁form ▁of ▁communication ▁was ▁sign ▁language . ▁He ▁also ▁noted ▁that ▁I rat aba ▁and ▁the ▁Moh ave