Question: Laton Alton Huffman was an American photographer who worked at an Army post  situated on the south bank of the Yellowstone River, at the mouth of what?
Sentence (from "Laton Alton Huffman"): Laton Alton Huffman (October 31, 1854 – February 28, 1931) was an American photographer of Frontier and Native American life.
Relevant evidence: Yes