Hugh Lofting

Hugh John Lofting was a British author, trained as a civil engineer, who created the character of Doctor Dolittle — one of the classics of children's literature. Hugh Lofting's doctor from Puddleby-on-the-Marsh who could speak to animals first saw light in the author's illustrated letters to children, written from the trenches during World War I when actual news, he later said, was either too horrible or too dull. ([Source][1])

[1]: en.wikipedia.org/wiki/Hugh_Lofting