A retired surgeon with a New Science knack
The posse met Dr. Ezra Whitehall on a train bound for Denver, CO. He was a retired surgeon living in Cheyenne. He was on his way to Salt Lake City to present his invention, the Angel of Mercy, to Smith & Robards. It was designed as a clockwork medical assistant for surgeries, but after being inhabited by gremlins on the train, it killed several people. Dr. Whitehall was almost killed himself! The posse managed to destroy the angel and kill the gremlins, but with no physical evidence to the contrary, Dr. Whitehall was blamed for the deaths caused by his contruct. The posse last saw him being led away in cuffs from the Denver station.