Charles Helm
Books by Charles Helm
Through an Unknown Country
The Jarvis–Hanington Winter Expedition through the Northern Rockies, 1874–1875
The Forgotten Explorer
Samuel Prescott Fay's 1914 Expedition to the Northern Rockies
The Forgotten Explorer
Samuel Prescott Fay's 1914 Expedition to the Northern Rockies
Daniel's Dinosaurs
A True Story of Discovery