“I did not say exactly that,” replied Thorndyke. “I said that I was not going to look for any particular thing or fact. I am going in the hope that I may observe something that may start a new train of speculation. But that is not all. You know that an investigation follows a certain logical course. It begins with the observation of the conspicuous facts. We have done that. The facts were supplied by Marchmont. The next stage is to propose to oneself one or more provisional explanations or hypotheses. We have done that, too⁠—or, at least I have, and I suppose you have.”

“I haven’t,” said I. “There is Jeffrey’s will, but why he should have made the change I cannot form the foggiest idea. But I should like to hear your provisional theories on the subject.”

“You won’t hear them at present. They are mere wild conjectures. But to resume: what do we do next?”

“Go to New Inn and rake over the deceased gentleman’s apartments.”

Thorndyke smilingly ignored my answer and continued⁠—