The True Tale of the how Wanted Fugitives Sister Thomas Josephine of St. Louis, Missouri and Abraham C. Muir made a Daring Escape from Capture and Raced for the Mexican Border.NUNSLINGER IV finds Sister Thomas Josephine and Abraham Muir friendless, penniless and on the wrong side of the law in the backstreets of Sacramento. Their only option is to flee for Mexico... with half the Union Army on their trail.