Photograph of Ontario & San Antonio Heights mule car on Euclid Avenue, Ontario, ca.1887. In the foreground at center, a small trolley car is visible full of passengers. Four rows filled with individuals can be seen, and a man stands on each end of the car. To the left of the car, a large mule can be seen standing in a small cage that extends to the top of its legs. The mule wears several harnesses attaching it to the car. On the side of the car, the words "Ontario & San Antonio Heights R.R. Co." can be seen. In the background at center, the large Southern Pacific Hotel is visible. To the left of the hotel stands a large flagpole with the American flag.