This one made me think of you when I saw it! "Donkey Boys 1904" http://www.shorpy.com/ You may have to scroll down to see the picture. Apparently they hired these two to give donkey rides to little kids in Central Park! This has become one of my favorite sites to go to just for fun. Literally thousands of old, old pictures to go through! I can spend hours looking through these before I come up for air!