He rescued more than 100 enslaved people and yet, barely anyone has heard of him. "Henson has largely been lost to history. Every month, nearly 1.4 million people Google Abraham Lincoln, 228,000 lookup Frederick Douglass, and 135,000 search for Confederate general Robert E Lee." But, just about 4,000 people search for Henson's name. Why? Jared A. Brock investigates.