The Mark Twain Zephyr
Entered service October 28, 1935
Service between St. Louis and Burlington

Departing Burlington, Iowa, just minutes ahead of the eastbound Nebraska Zephyr, the four-car 9903 -- known as the Mark Twain Zephyr -- will hug the west bank of the Mississippi for a considerable portion of its 6 1/2-hour journey back to St. Louis. The Mark Twain was the first Burlington streamliner to have its cars named; the power car was Injun Joe, followed by Becky Thatcher, Tom Sawyer, and Huck Finn.