This document contains a collection of images documenting the use of horse and mule power in the United States between 1862 and 1922. The images depict various modes of transportation including wagons, carts, carriages and trolleys pulled by horses and mules. They also show horses and mules used on farms, for military purposes during the Civil War, and by tradespeople in cities and towns across the country during this period. The time period captured spans from the Civil War era through the early 20th century as automobile use was on the rise.