Marguerite Henry (1902 - 1977) was an American writer of children's books; based on true stories of horses and other animal captivated entire generations. Justin Morgan has a Horse is a children's historical novel, illustrated by Wesley Dennis. it concerns horse-breeding in Vermont in the late century, it was first published in 1945 and was a newbery honor recipient in 1946. In 1972 the book was made into a film by Disney Studios. Summary: The scholmaster, Justin Morgan, takes two colts as payment for an old debt. The younger of the two grows into a sturdy, though small, riding horse wich served as the foundation of the Morgan breed of horse.