Pompeys Pillar  -  Pompeys Pillar National Historic Landmark, MT.  Clark and his party arrived at a large sandstone rock formation on July 25, 1806.  He named it "Pompey's Tower" after Sacagawea's son, Jean Baptiste Charbonneau.  Clark had developed a great fondness for the boy and had given him the nickname, "Pomp."  In the Shoshone language, "Pompy" means "Little Chief."
Photo:  ©Charley Van Pelt