"On the 27th we came to the Cascade Rapids. The first or Little Cascade has about two feet fall, the second or Grand Cascade, a mile farther, is about a six foot sheer drop"

This quote is explaining the Cascade Rapids, which are a set of rapids located on a river. The very first rapids, the Little Cascade, has a two-foot drop, while the 2nd rapids, the Grand Cascade, has a six-foot large drop. This quote is most likely from Ernest Thompson Seton's book, "Wild Animals I Have Known," which was published in 1898. Seton was an American biologist, author, and artist who wrote thoroughly about the natural world. He was particularly interested in the behavior of animals and their interactions with people. This quote is most likely from his travels, as he was understood to explore the wilderness and file his findings. The Cascade Rapids are likely a part of his journey, and this quote is a description of the rapids he came across.