[ Van Steenwyk / My Name is York ]
Publisher's blurb: "A slave describes the journey he makes with his master, Captain William Clark, into the uncharted territory of the American West to find a water passageway to the Pacific Ocean."
A look at the Lewis and Clark expedition from the perspective of Clark's slave, York. According to the Amazon's book search function Seaman is mentioned only once, although he is included in some of the illustrations.
Amazon.com page