Two matching 5 quart cast iron pots, wired together with 4 beef leg bone chunks on top, held up by a double layer of 1/4" hardware cloth, cut to overhang the outside edge all the way around, sealed with native clay. I also wired the two pots together, which helped later when I used the wire to pick the whole thing out of the ground.
Baked for 3+ hours, initially hot full fire, then low flame with coals, left overnight covered with soil and opened the next morning. Top of sauce was black, bones nearly charcoal and brittle, odor reminiscent of a really really dirty BBQ grill, very intense, brown colored underneath top black layer.
Yield ~1.5 pints.
I can't wait to try it out.