In "A Sense of the World: How a Blind Man Became History's Greatest Traveler," author Jason Roberts writes the biography of a man who lived during the 1800s named James Holman who fought the slave trade in Africa and traveled the world unlike anybody before or since, all as he became blind later in life. This discussion took place on a 2006 episode of "Conversations On The Coast with Jim Foster" originating in San Francisco, California.