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Show oi1 sandstone sliale , which 435 at this low stage of water , for about five miles gave us some trouble . " ( R . 1534 . ) It was very difficult to locate a ( partic partic- partic ) ¬ ular point like the stratum of sandstone shale which ( lie he ) believes was below the mouth of Dirty Devil River some seven or eight miles . When they ran on to these ledges of shale , they had to get out of the boats and walk alongside , and as the shale dropped off suddenly at the end of these ( tilted tilted' tilted ) ledges one would sometimes suddenly go over his head [ in the water ] . These obstructions occured for some miles , and the process of getting over them repeated each time . In the middle of ( Oc- Oc ) tober , 1871 , ( when -when when ) he first passed the mouth of the San Juan River , it was rather low , like the ( Colo Colo- Colo ) rado , and not more than twenty or thirty feet wide , as he recollects . ( R . 1537 . ) The second time he passed the mouth of the San Juan River , about July 17 18721 the Colorado River was filled from wall to wall with a terrific current which - ( , I ) of course , ( backed bached ) up more or less the water of the San Juan , which was also quite high . ( R . ( 1537-1538 1537-4538 ) . ) On the first trip they encountered ( 110 no ) difficulty at the Crossing of the Fathers , this crossing being made possible by a shoal about ( one-half onehalf ) or ( three- three ) quarters of a mile long , which the Navajos and ( TJtes 'Utes Utes ) took advantage of coming down from the north or south , by wading the channel , getting on the shoal and following it . When the water was not too high , the crossing was marked by the ( In- In ) dians with little pyramids of rock all the way down . |