Silver Cord Cascade
Silver Cord Cascade is a horsetail type waterfall on Surface Creek, a tributary of the Yellowstone River in Yellowstone National Park. Surface Creek flows out of Ribbon Lake off the South rim of the Grand Canyon of the Yellowstone and plunges to the Yellowstone River. It is considered the tallest waterfall in Yellowstone.
Warren Angus Ferris
He kept a journal of his travels which were later published as the book "Life in the Rocky Mountains" (1940). On one trip in 1834, Ferris acted as a clerk for the American Fur Company in a trapping party to the mountains of western Wyoming. Out of curiosity, Ferris found Native American guides and made a side journey into what is today Yellowstone National Park. In his journal Ferris gave one of the first descriptions of the geysers of the Yellowstone region. 
From the surface of a rocky plain or table, burst forth columns of water of various dimensions, projected high in the air, accompanied by loud explosions, and sulphurous vapors, which were highly disagreeable to the smell. ...The largest of these wonderful fountains, projects a column of boiling water several feet in diameter, to the height of more than one hundred and fifty feet. ...These explosions and discharges occur at intervals of about two hours...