Interesting find, Ron! Do you think it was because of prevailing winds, or other reason? And I'm with Rick - maybe that crack doesn't go up too deep - it would make for a neat piece of wood furniture or at least a wood sculpture. We have a black walnut in our back yard, and the ice storm of 1998 brought down some limbs, which local woodcarvers (we donated the wood to them) made into wonderful pieces on their turning lathes.