Expeditions & surveys; Railroad surveys; Waterfalls; Cliffs; Great Falls (Mont.)
The cliffs at the falls are about "one hundred fifty to three hundred feet deep with a steep descent to within fifty feet of the bottom, and for the remaining distance perpendicular walls of red sandstone." "Above the falls the banks...
"There are two principle falls, one of twenty feet and the other of from ten to twelve feet; in the latter, there being a perpendicular fall of seven or eight feet; for a quarter of a mile the descent is rapid, over a rough bed of rocks, and...