“Would it be safe to venture into the place again in another guise?”
“They would know us.”
“Well,” said the old detective, with sudden inspiration, “I think I have a plan.”
“What is it?”
“Do you see the alley on this side of the building?”
“Yes.”
“Well, I think there is a small window on a level with the ground. It is directly over the table where those fellows sit.”
“Indeed!”
“It is true. I remember seeing it. Now, if we can only creep in there and either open the window or remove a pane of glass, we ought to hear every word.”
“Good! Let us try it.”