This rare photo of Chicago & Alton 2-6-6-2 Mallet compound No. 700 comes from the collection of Gary Thompson. The C&A bought three of these locomotives from ALCo's Brooks Works in 1910 for coal train and helper service. Apparently Nos. 700-702 were not well suited to the railroad's mostly prairieland profile, and this one was resold to the Chesapeake & Ohio after only a year of service. The two others lasted till 1931 when the Alton's Baltimore & Ohio owner took them east, sending them to scrap in 1938. Note the arched-window cab and the headlight mounted in the center of the smokebox, unusual for a Mallet articulated which usually had the headlight mounted above the pilot. Photographer, date and location are unknown. For the specifications of the K-1 class, see the commentary for No. 702 following.