Pow-Wows, or Long Lost Friend, by John George Hoffman, [1820], at sacred-texts.com
TO CURE ANY EXCRESCENCE OR WEN ON A HORSE.
Take any bone which you accidentally find, for you
dare not be looking for it, and rub the wen of the horse with it, always bearing in mind that it must be done in the decreasing moon, and the wen will certainly disappear. The bone, however, must be replaced as it was lying before.