Captured on October 11, 1863, James Riley Weaver, a Union cavalry officer, spent nearly seventeen months in Confederate prisons. Remarkably, Weaver kept a diary that documents 666 consecutive days of his experience, including his cavalry duties, life in a series of prisons throughout the South, and his return to civilian life. It is an unparalleled eyewitness account of a crucial part of our history. Weaver's observations never veer into romanticised descriptions; instead, he describes the "little world" inside each prison and outdoor camp, describing men drawn from "every class of society, high and low, rich and poor, from every country and clime." In addition, Weaver records details about life in the Confederacy that he gleans from visitors, guards, new arrivals, recaptured escapees, Southern newspapers, and even glimpses through windows. As the editors demonstrate, Weaver's diary-keeping provided an outlet for expressing suppressed emotions, ruminating on a seemingly endless confinement that tested his patriotism, religious faith, and will to survive. In the process, he provides not only historically important information but also keen insights into the human condition under adversity.