Doctor Dolittle's Post Office by Hugh Lofting

On the coast of West Africa, about twenty miles to the northward of Fantippo, there was a cape running out into the sea which had a lighthouse on it called the Cape Stephen Light. This light was kept carefully burning by the government who controlled that part of Africa, in order that ships should see it from the sea and know where they were. It was a dangerous part of the coast, this. There were many rocks and shallows near the end of Cape Stephen. And if the light were ever allowed to go out at night, of course, ships traveling that part of the sea would be in great danger of running into the long cape and wrecking themselves.

Now, one evening not long after the Golden Jays had gone west, the Doctor was writing letters in the post office by the light of a candle. It was late and all the animals were fast asleep long ago. Presently while he wrote he heard a sound a long way off, coming through the open window at his elbow. He put down his pen and listened.