"Doctor Dolittle's Post Office" by Hugh Lofting is a novel published in 1923. Set on the West Coast of Africa, the story follows Doctor Dolittle as he captures a slave trader's ship and establishes a revolutionary postal service for the African kingdom of Fantippo. Using migrating birds to carry mail across continents, he anticipates modern airmail while encountering prehistoric creatures, inventing animal alphabets, and battling armies. The tale culminates in his meeting with Mudface the Turtle, the oldest living creature on Earth. (This is an automatically generated summary.)