Pow-Wows, or Long Lost Friend, by John George Hoffman, , at sacred-texts.com
A means to overcome and end all fighting and anger, and to cause a sick man to weep when his health is restored, or to sing with a cheerful voice when on his death bed; also a very good remedy for dim eyes or shining of the eyes. This weed grows at the time when the swallows build their nests or eagles breed. If a man carries this' about him, together with the heart of a mole, he shall overcome all fighting and anger. If these things . are put upon the head of a sick man, he shall weep at the restoration of his health, and sing with a cheerful voice when he comes to die. When the swallow-wort blooms, the flowers must be pounded up and boiled, and then the water must be poured off into another vessel, and again be placed to the fire and carefully skimmed; then it must be filtered through a cloth and preserved, and whosoever has dim eyes or shining eyes, may bathe his eyes with it, and they will become clear and sound.