Parson's Southwestern Medicinal Cures Guide

Parson's Southwestern Medicinal Cures Guide was a pharmacognostic guide to natural medicines prepared from plants found in the Southwestern United States of America.

Watson kept a copy of this book in his apothecary. When Dr. Rodham diagnosed Nate Trotter with depression and melancholia aggravated by a liver disease, the Stranger used this book as a reference to mix the necessary components of the medicine (since Watson fled to Dry Rot on account of The Kid's imminent arrival at Diamondback).