Hamlin's Wizard Oil

Hamlin's Wizard Oil was an American patent medicine sold as a cure-all under the slogan "There is no Sore it will Not Heal, No Pain it will not Subdue."

They used horse-drawn wagons and dressed in silk top hats, frock coats, pinstriped trousers, and patent leather shoes—with spats.

[6][7] Performers included James Whitcomb Riley, singer and composer Paul Dresser from Indiana,[8] and southern gospel music progenitor Charles Davis Tillman.

At these gatherings, John Austin Hamlin delivered lectures replete with humor borrowed from the writings of Robert Jones Burdette.

[9] Grinnell College research points out that the Hamlins claimed efficacy for Wizard Oil on not only human beings but also horses and cattle, one poster displaying an elephant drinking the product by lifting the bottle with its trunk.