Ira Aten (1862-1953) was the epitome of a frontier lawman. When as a youth he heard of the killing by Rangers of the notorious outlaw Sam Bass at Round Rock, Aten's neighborhood, he altered his plans of being a cowboy and instead set his sights on becoming a Texas Ranger. At age twenty he enrolled in Company D during the transition of the Rangers from Indian fighters to topnotch peace officers. This unit—and Aten—would have a lively time making their mark in nineteenth-century Texas.