"I should have thought," said I, "that it would be better to go by daylight. Those old chambers are not usually very well illuminated."
"That is well thought of," said Thorndyke. "We had better take a lamp with us. Let us go up to the laboratory and get one from Polton."
"There is no need to do that," said I. "The pocket-lamp that you lent me is in my overcoat pocket. I put it there to return it to you."
"Did you have occasion to use it?" he asked.
"Yes. I paid another visit to the mysterious house and carried out your plan. I must tell you about it later."
"Do. I shall be keenly interested to hear all about your adventures. Is there plenty of candle left in the lamp?"
"Oh yes. I only used it for about an hour."
"Then let us be off," said Thorndyke; and we accordingly set forth on our quest; and, as we went, I reflected once more on the apparent vagueness of our proceedings. Presently I reopened the subject with Thorndyke.
"I can't imagine," said I, "that you have absolutely nothing in view. That you are going to this place with no defined purpose whatever."
"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."