Well, Watson, what do you think of it?" asked Holmes, as we travelled back next morning.
"I can see that you are not satisfied."
"Oh, yes, my dear Watson, I am perfectly satisfied. At the same time, Stanley Hopkins's methods do not commend themselves to me. I am disappointed in Stanley Hopkins. I had hoped for better things from him. One should always look for a possible alternative, and provide against it. It is the first rule of criminal investigation."
"What, then, is the alternative?"
"The line of investigation which I have myself been pursuing. It may give us nothing. I cannot tell. But at least I shall follow it to the end."