"Yes," said the Doctor. "I imagine there are lots of different kinds of birds and beasts in these parts that can be found nowhere else in the world."
At last, while it was still just light enough to see, the snake swung into the left and once more entered the outskirts of the mangrove swamps. Following him with difficulty in the fading light, the Doctor was led into a deep glady cove. At the end of this the nose of the canoe suddenly bumped into something hard. The Doctor was about to lean out to see what it was when a deep, deep bass voice spoke out of the gloom quite close to him.
"Welcome, John Dolittle. Welcome to Lake Junganyika."
Then looking up, the Doctor saw on a mound-like island the shape of an enormous turtle—fully twelve feet across the shell—standing outlined against the blue-black sky.
"The Doctor saw the shape of an enormous turtle"
The long journey was over at last.