The bast from the black walnut (_Juglans nigra_, L.) was encountered
twice in burden straps from the Iroquois (Museum of the American
Indian, Heye Foundation). These fibers had apparently been previously
treated, both chemically and mechanically. They were probably boiled
in ashes, pounded, and then straightened so as to make them usable in
twisting cord and thread. One such specimen in the above Museum
carries the catalogue number 16-5208.