Stationed in the Sunken Lands of Arkansas, U.S. Ranger Jack Calhoun's violent, fast-paced detective stories set in the river counties' swamps were among the most popular stories of readers of Flynn's Weekly, running for almost 70 stories from the 1920s-30s. Written by prolific author Edward Parrish Ware, this series has never before been reprinted. Volume 1 collects the first seven stories, along with an introduction by pulp historian Robert Sampson.