“Did you not know it?”

“Not the least in the world.” But, pausing a moment, he added: “Still, it does not surprise me. After all, we are only four miles from the coast.”

“The coast?” I asked, puzzled. “What has that got to do with it?”

Poirot shrugged his shoulders.

“Surely, it is obvious!”

“Not to me. No doubt I am very dense, but I cannot see what the proximity of the coast has got to do with the murder of Mrs. Inglethorp.”

“Nothing at all, of course,” replied Poirot, smiling. “But we were speaking of the arrest of Dr. Bauerstein.”