On November 4, 1857, a notice appeared in the Cambridge Democrat, the local newspaper of Cambridge, Maryland. Submitted by one Dr. Alexander Hamilton Bayly, it offered a $300 reward for anyone who could locate and kidnap a 28-year-old woman named Lizzie Amby, whom Bayly had enslaved. She had fled Bayly’s house some days before, bound north, along with her husband, Nat; a bag of possessions; and Nat’s knife and pistol. The Ambys were just two members of a group of 16 who took part in that journey, led by the…