The following pages treat of hell—A Kansas hell and a Missouri hell. I was an inmate of the Kansas penitentiary for sixteen months, and make mention of what came under my own observation in connection with what I experienced. While an inmate of this prison I occupied cells at various times with convicts who had served terms in the Missouri prison. From these persons I gathered much useful material for my book. After my release I visited the Missouri penitentiary, and verified the statements of those criminals, and gathered additional material from the prison records and the officials.