"It was passing off then—I remarked upon it at the time."
"So you did. I thought rigor usually lasted twenty-four hours or so."
"It does, sometimes. Sometimes it goes off quickly. Quick come, quick go, as a rule. Still, I agree with you, that in the absence of other evidence, I should have put the death rather earlier than ten o'clock."
"You admit that?"
"I do. But we know he came in not earlier than a quarter-past ten."
"You've seen Williamson, then?"
"Oh, yes. I thought it better to check up on the thing as far as possible. So I can only suppose that, what with the death being sudden, and what with the warmth of the room—he was very close to the fire, you know—the whole thing came on and worked itself off very quickly."
"H'm! Of course, you knew the old boy's constitution very well."
"Oh, rather. He was very frail. Heart gets a bit worn-out when you're over the four-score and ten, you know. I should never have been surprised at his dropping down anywhere. And then, he'd had a bit of a shock, you see."
"What was that?"