Meriwether Lewis: June 13, 1805

I proceded on this course about two miles with Goodrich at some distance behind me whin my ears were saluted with the agreeable sound of a fall of water and advancing a little further I saw the spray arrise above the plain like a collumn of smoke which would frequently dispear again in an instant caused I presume by the wind which blew pretty hard from the S.W. I did not however loose my direction to this point which soon began to make a roaring too tremendious to be mistaken for any cause short of the great falls of the Missouri. here I arrived about 12 OClock having traveled by estimate about 15 Miles. I hurryed down the hill which was about 200 feet high and difficult of access, to gaze on this sublimely grand specticle. I took my position on the top of some rocks about 20 feet high opposite the center of the falls.

Source: Thwaites, Original Journals of the Lewis and Clark Expedition (1904–05). Public domain.