“That was a close call, Harry.”

“I should say so.”

“To think he was so near us and we did not know it. I fear we have lost ground, my boy.”

“We are the shadowed!”

“Just so.”

“Well,” said the young detective, resolutely, “we’ve got to rig a trap for those fellows. If we don’t they’ll finish us.”

“You are right!”

“What can we do?”

“I have an idea!”

“What is it?”