Moving van at an apartment eviction in New York circa 1908. View full size. 5x7 glass negative, George Grantham Bain Collection.

September 1908. Young mule drivers and trapper boy at the Brown Mine near Brown, West Virginia. Underground from 7 a.m. to 5:30 p.m. View full size.

January 1911. "Serafino driving Chub, his mule. Shaft #7, Pennsylvania Coal Company mine at South Pittston." Bright spots are open flames of lamps on the boys' hats. Photograph by Lewis Wickes Hine. View full size.

January 1911. Willie Bryden holding the door open while a trip goes through. View full size. Photograph by Lewis Wickes Hine.

January 1911. Mule power and motor power. A young driver in Shaft #6, Pennsylvania Coal Company mine at Pittston. View full size. 5x7 glass negative by Lewis Wickes Hine. National Child Labor Committee Collection.

Archie Roosevelt, the son of Theodore, sits on a pony. Photograpy by Pach Bros., c. 1903. View full size. | Archie's biography.

Borden team, winner of the obstacle test in the Work Horse Parade on Union Square. June 13, 1908. View full size. George Grantham Bain Collection.

Work Horse Parade obstacle course on Union Square, New York City. June 13, 1908. View full size. 5x7 glass negative, George Grantham Bain Collection.

Wagons at the Center Market, Washington, D.C., circa 1890. View full size.

"Mule in Hale County, Alabama, 1935." Photo by Walker Evans. View full size.

The R.P. Bean Ranch, with four cowboys and three horses, near Van Horn, Texas, c. 1910. View full size (Courtesy Portal to Texas History).

August 1912. "The wagon that delivers Home Work to Somerville, Massachusetts. The owner of the wagon (who is not the driver) is O. H. Brown, 27 Main Street, Reading. These wagons (about 4 in all) are worked on commission, not owned by factory." ("Home work" here meant pre-cut cloth patterns ready to be sewn into various articles of clothing.) View full size. Photograph by Lewis Wickes Hine. Note the curious tassels hanging off the horse. (Answer: It's a fly fringe.)

"Eight-year old Jack driving horse rake. A small boy has difficulty keeping his seat on rough ground and this work is more or less dangerous." August 1915, western Massachusetts. View full size. Photograph by Lewis Wickes Hine.

"New York City: Horse overcome by heat." Circa 1910. View full size. George Grantham Bain Collection. Hopefully the equine ambulance was on its way.

"See what Prince will do for me." Prince Albert, Ida Cuthbertson's "famous educated horse." Brown Studio, Riverside, circa 1909. View full size.