tell you! Sail the ship close to the rock and let me jump out on it."
So the Doctor brought the ship as close as he could and let down the anchor. Then he and Jip got out of the ship on to the rock.
Jip at once put his nose down close to the ground and began to run all over the place. Up and down he went, back and forth—zig-zagging, twisting, doubling and turning. And everywhere he went, the Doctor ran behind him, close at his heels—till he was terribly out of breath.
At last Jip let out a great bark and sat down. And when the Doctor came running up to him, he found the dog staring into a big, deep hole in the middle of the rock.
"The boy's uncle is down there," said Jip quietly. "No wonder those silly eagles couldn't see him!—It takes a dog to find a man."
So the Doctor got down into the hole, which seemed to be a kind of cave, or tunnel, running a long way under the ground. Then he struck a match and started to make his way along the dark passage with Jip following behind.
