Doctor Dolittle’s Post Office by Hugh Lofting

Nearly all of the history of Doctor Dolittle’s post office took place when he was returning from a voyage to West Africa. Therefore I will begin (as soon as I have told you a little about how he came to take the journey) from where he turned his ship towards home again and set sail for Puddleby-on-the-Marsh.
Some time before this the pushmi-pullyu, after a long stay in England, had grown a little homesick for Africa. And although he was tremendously fond of the Doctor and never wanted to leave him altogether, he asked him one winter day when the weather was particularly cold and disagreeable if he would mind running down to Africa for a holiday—just for a week or two.
The Doctor readily agreed because he hadn’t been on a voyage in a long while and he felt he too needed a change from the chilly December days of England.