Early tourists had to brave a roadless wilderness to see the sights of the new Yellowstone National Park. That meant supplies had to be carried by pack animals—often cantankerous mules. One such tourist was the Earl of Dunraven, an Irish noble who first visited the park in 1874. (Dunraven Pass was named after him.) Dunraven was an astute observer and a droll wit. Here’s his description of how to pack a mule.