About Marguerite Henry
Marguerite Henry was an American writer of children's books, writing fifty-nine books based on true stories of horses and other animals. She won the Newbery Medal for King of the Wind, a 1948 book about horses, and she was a runner-up for two others. One of the latter, Misty of Chincoteague (1947), was the basis for several related titles and the 1961 movie Misty. Henry sold her first story at the age of 11.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.