Pioneer Days in the Black Hills is a rough-and-tumble account of the early days of Deadwood, Dakota Territory. In 1874, after leading an expedition into the Black Hills, George Armstrong Custer announced that he had found gold "among the roots of the grass." Almost overnight a number of settlements sprang into existence. Among them was Deadwood.

In April 1876, John S. McClintock arrived in search of gold. Entering a series of speculations and employments that won him moderate prosperity, he made Deadwood his home. During his later years, he wrote his memoirs, presented here for the first time in half a century.