CHICAGO, Dec. 6.—As a result of the reckless running of a racing automobile in Michigan Avenue yesterday by an unidentified chauffeur, a park policeman was probably fatally injured, two horses were killed, and the lives of Calvin M. Favorite, and D. J. Simpson, of the Armour Company, were placed in jeopardy.

Mounted Policeman Joseph Wall saw the automobile running rapidly along the Boulevard, and putting spurs to his horse, dashed after the machine. As he followed it, a horse driven by Mr. Simpson, who was accompanied by Mr. Favorite, frightened by the automobile, shied in front of the policeman's horse. The force of the collision threw Wall thirty feet to the pavement immediately in front of the residence of John M. Gates. A shaft of the buggy penetrated the breast of the horse ridden by the policeman, and Mr. Simpson's horse suffered a broken leg. Both animals had to be killed. The chauffeur escaped.

Wall was unconscious when picked up, and was found to have a fractured skull, several broken ribs and other serious bruises. He was taken to a hospital.