Doc Marlowe had given up the road when I knew him, but he still dealt in what he called "medicines". His stock in trade was a liniment that he had called Snake Oil when he travelled around. He changed the name to Blackhawk Liniment when he settled in Columbus. Doc didn't always sell enough of it to pay for his bed and board, and old Mrs, Willoughby would sometimes have to "trust" him for weeks at a time. She didn't mind, because his liniment had taken a bad kink out of her right limb that had bothered her for thirty years.