I am aware that none of the above information tells how he became an author of children's books, or what led up to his winning the Newbery in 1924. Sometimes we have to take what we get.
Books:
Crete the Forerunner of Greece
The Dark Frigate (1924 Newbery Award)
The Great Quest
thanks to:
http://newbery.homepage.com/books/1924.html
www.amazon.com