The very early clip of a jockey riding a horse, which Emerald claims features her and OJ's ancestor, is a real 1878 animated series of photographs, one of the first moving images ever, which has come to be called
Sallie Gardner at a Gallop (1878). Sallie Gardner is the name of the horse; the two jockeys were listed as being named "C. Marvin" and "G. Domm." Neither of their identities are known, though they very well could have been black as Emerald claims. In those days many jockeys were black, such as thirteen of the fifteen jockeys racing at the first Kentucky Derby in 1875.
