I would suspect that the drum beaters for walnut hull based dyes, are giving the material more attention than it deserves. With all the natural dye stuffs that were available that produce good strong colors, without all the problems walnut hulls possess, why would you put yourself through that, if you didn't have to. Most folks on the frontier had a tanning vat somewhere beyond the range of your nose, that could produce a similar color by just stirring the material into the working tan bark solution and giving a day or two.
Hungry Horse