“I met her two or three times. No more.”

“Did she strike you as having a bad heart?”

“No; but that doesn’t mean anything. Lots of people have bad hearts. It doesn’t always show.”

“But they don’t play tennis two days before they die as Janet did.”

I could see he was beginning to get worried.

“What are you hinting at?”

“Nothing. I’m just stating a fact. I’m not sold on the idea she died of heart failure.”

While he stared at me the silence in the room was heavy enough to sink a battleship.

“You’re not suggesting…” he began and broke off.

“Not yet,” I said. “But it’s something we should keep in mind.”