Mark Twain

Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), better known by his pen name of Mark Twain, was an American author and humorist who appears on Mystery Train Island. He wrote the books The Adventures of Tom Sawyer and its sequel Adventures of Huckleberry Finn. At the time of Mystery Train, he was writing Huckleberry Finn.

Role in Mystery Train Island
Mark Twain is one of the passengers on The John Bull. He was originally a suspect who was thought to be the thief that stole Edison's Motion Capture Device by you until he was proven innocent. He provides some clues throughout your investigation including the info about the mysterious person in the last car. Most of the time however, he is seen in his passenger cabin suffering from motion sickness and complaining about the coal fumes. Later he prabably showed off his invention like the others.