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Show ( j' j ) itu aiu . t JL . ft . , . . ( yfrT'-Kiifft yfrTKiifft ) ' . trr , j . U ( 'MiftbJ MiftbJ ) 665 one or more boatmen , or , as in one of my Colorado river trips , under the direction of another ( boat boat- boat ) man . ( R . 2559 . ) As a result of his explorations and research he has written several books . ( R . 2559 . ) Down the Columbia , published about 1921 ; Down the ( Yellow Yellow- Yellow ) stone , about 1922 ; the third A History of the ( Colo Colo- Colo ) ¬ rado River , Yesterday , Today and Tomorrow , for which he ( had bad ) been collecting historical material for a long time . That was as nearly as he could make it , a history of the river explorations and a study of the possibilities of future development . Following that , he wrote another Colorado river book called Down the Grand Canyon , which ( in- in ) cluded an account of the voyage he had made through the Grand Canyon with a geological ( Sur- Sur ) vey party in 1923 , and a trip he made up and down Glen canyon the year previous , a voyage he had made through the delta of the river , and a voyage through the Alamo river , which takes the ( drain drain- drain ) age of the Imperial Valley to Salton Sea , two hundred feet ( "below below below ) sea level . His book ( "On On ) the Roof of the Rockies , " was first published as an article for the National Geographic , under the title of ( "Mother Mother ) of ( Rivers Puivers ) . " The ( Co- Co ) lumbia ice fields to the roof of the ( Rockies RocIdes ) is the only place in the world in which three major rivers head leading to three major oceans , the Columbia to the Pacific , the Athabasca to the Arctic , the ( Sas- Sas ) katchewan , Lake Winnepeg , Hudson Bay , and the Atlantic . ( R . ( 2559-2560 "559-2560 ) . ) That dealt only |