They could hear the water lapping the sides of the passage that led inwards from the shore.
"It must be knee-deep round the bend," said Chris.

"Yes, I'll forgive you, Bertie.

I daresay it wasn't altogether your fault, and I expect your head aches, doesn't it?
I hope it isn't very bad.

Is there a very big lump?
Let me feel." She passed her hand over his forehead till her fingers encountered the excrescence they sought.
"Oh, you poor boy, it's enormous!" she exclaimed.

"Why didn't you tell me before?
We must bathe it at once." But Bertrand laughed and gently drew her hand away.