The Rocky Mountain Letters of Robert Campbell

Originally published in The National Atlas and Tuesday Morning Mail (Philadelphia), Vol 1, no. 14-19, Nov 1 - Dec 6, 1836
Reprinted in 1955 as The Rocky Mountain letters of Robert Campbell. Printed for Frederick W. Beinecke.

• Letter I - Lewis' Fork, July 18th, 1832
• Letter II - Green River, Rocky Mountains, July 10, 1833
• Letter III - Fort William, Nov. 16th, 1833
• Letter IV - Fort William, Dec. 8th, 1833
• Letter V - Rocky Mountains, July 12, 1836