Edgar Wallace,
Terror Keep — Chapter 3
(1927)
“ Olga Crewe laughed."Have you seen the cliffs?" she said, and led the way back to the long wall, and for a quarter of an hour they stood, their arms resting on the parapet, looking down into the gloom."You ought to get some one to row you round the face of the cliff. It's simply honeycombed with caves," she said. "There's one at the water's edge that tunnels right under the Keep. When the tides are unusually high they are flooded. I wonder Daver doesn't write a book about it."There was just the faintest hint of a sneer in her tone, but it did not escape Margaret's attention. ”
