In the Rider-Waite Tarot deck and other esoteric decks made for cartomancy, the Fool is shown as a young man, standing on the brink of a precipice, accompanied by a small dog.
The Tarot of Marseilles and related decks depict a bearded person wearing what may be a jester's hat; he always carries a bundle of his belongings on a stick slung over his back. He appears to be getting chased away by an animal, either a dog or a cat.
Further information on the importance of the Tarot in Blood Meridian can be found on the discussion page at CormacMcCarthy.com. Click here.