Al G. Barnes Circus was an American circus run by Alpheus George Barnes Stonehouse.
Stonehouse started the show in 1895 with a pony, a phonograph, a stereopticon. His circus was purchased by the American Circus Corporation in 1929 and was merged with the Sells-Floto Circus, John Robinson Shows, and Sparks Circus. That same year John Nicholas Ringling bought out the American Circus Corporation and folded all the performers into his Ringling Bros. and Barnum & Bailey Circus. 
One of their more famous animals was Black Diamond, an Indian elephant whose unpredictable temper resulted in the deaths of four people.