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consist of ton companies ol the Seventh Cavalry, two companies of infantrv, and such Indian scouts as lie might select, all to be ready to leave as near June 20th as possible, and to return to Fort Lincoln in 60 davs. Captain W illiam Ludlow was the engineer officer of the expedition, Professor X. II. Winchell, state geologist of Minnesota, was the ge-
fcssor Marsh of Yale College as paleontologist and zoologist, and \V. II. Illingworth of St. Paul was the stereoscopic photographer. Along with the guides, interpreters, and teamsters, about 1,000 men in all, there were 110 wagons and ambulances, three Catling guns and a 3-inch rifle.
The expedition left Fort Lincoln on July 2nd,
WAGONTRAIN. The four columns are in readiness for tlie day?s Journey. The photographer, taking his pictures in pairs for the parlor stereoscope, liked at least one-half of the picture in foreground to give it depth. When this view is placed in a stereoscope, the viewer has a feeling of observing this scene from a height. Illingworth photo courtesy of National Archives.