This is a cabinet card photo of Rattlesnake Pete in one of his snakeskin outfits. He is wearinf a snakeskin tie and coat, which is adorned with rattlesnake heads. He's holding a snake-effect stick which was used as a walking stick.
The picture above is of Rattlesnake Pete in his three-piece suit. This outfit consisted of a snakeskin coat, vest, hat, bowtie, and pants. He even had a cane covered in snakeskin.