Blue Duck, sometimes referred to as Bluford Duck, (1858? - 1895) was an outlaw of the Old West, probably best known for a photograph taken of him around the mid-1880s, in which he posed with Belle Starr, a famous Old West female outlaw.
Belle Starr, sitting sidesaddle staring intently at one of the Roeder brothers, photographers in Fort Smith, Arkansas. She is wearing a single loop holster with a pearl-handled revolver, with a riding crop and is wearing leather gloves. This was taken in 1886, about three years before her death in Indian Territory at the hands of an unknown shooter.
Belle Starr, outlaw. "Belle always harbored a strong sense of style, which would feed into her later legend. A crack shot, she used to ride sidesaddle while dressed in a black velvet riding habit and a plumed hat, carrying two pistols, with cartridge belts across her hips" - Wikipedia