During the 127th Warrenton Horse Show in Virginia the inaugural $7,500 William E. "Bill" Graves Memorial Thoroughbred Hunter Derby, sponsored by Gainesway Sales Company, will be held on Thursday, Sept. 3, according to a press release from the show on Monday. The event will be a two-round hunter derby class at the three foot height and is open to any Thoroughbred horse. Warrenton plans to continue to hold the Back From the Track hack, the Too Slow to Go hack, the Thoroughbred Hunter Division--2'6'" or 2'9", the $2,500 Take2 Thoroughbred...