This type of figure results from the weaving together of wood fibers strengthening the areas around major limbs and branches. The term feather is used because the pattern created by this natural process resembles a feather. The slab pictured below was sawn from a California Claro walnut tree, estimated to be over one hundred and fifty years old. The white strip in the upper left hand portion of the slab, is a tally stick. A tally stick is used in commercial lumber mills for measuring board footage.