The Chicago, Burlington & Quincy's first twelve class S-4 Hudsons were delivered by the Baldwin Locomotive Works in 1930. The railroad's West Burlington shops later streamlined one of these engines and constructed another, for a total of thirteen. These fast passenger locomotives had 78-inch drivers, a boiler pressure of 250 pounds per square inch, and 25x28-inch cylinders, all producing 47,700 pounds of tractive effort. They boasted a grate area of 88 square feet, an evaporative heating surface of 4247 square feet, and 1830 square feet of superheater surface. The locomotive weight for this class is given as around 392,000 pounds. R. D. Patterson. took this photo, which comes from the collection of Gary Thompson, at Galesburg, Illinois on June 4, 1960. See the next page for the history of this locomotive following its retirement.