Major Greg Duprey

Major Greg Duprey is a former U.S. cavalryman who had a change of heart after meeting the Sioux. Accompanying the anthropologist Dr. David Yellin, he got stuck on Mars.

After his arrival in the ill-fated first capsule, Duprey, together with Dr. David Yellin and Richard Sherman went out to explore the mines. It turned bad when he and Sherman got stuck in the mines near Syrtis Major at 10°N 71°E after a cave-in while searching for iron ore for Andrew Carnegie. The Avatar was able to free the two men with the help of a Martian drilling machine, clearing away the rubble that blocked the egress.

After the Avatar had freed him in Martian Dreams, he gladly vouched for entry to Olympus. At the end, he returned to Earth.

Trivia

 * Greg Duprey is meant to represent the Avatar's Companion, Dupre.