Vanguard of the Caravans: A Life Story of John Mason Peck is a biographical book written by Hayne and Coe. The book tells the story of John Mason Peck, a pioneer missionary who played a significant role in spreading Christianity in the American West during the 19th century.The book begins with Peck's early life in Connecticut and his decision to become a minister. It then follows his journey as he travels westward to Illinois and Missouri, where he...