"Where are they?"
"I do not know. I only propose to furnish you the opening clues and let you follow them up and find the plates and all the evidence."
"Your brother knows where the plates are concealed?"
"He does."
"Can you not secure the information from him?"
"I cannot. I have tried to do so, but he tells me he is bound by terrible oaths not to reveal where the workshop is located."
"He never works at your home?"
"Never. He is often gone away all night. I think they work at night."
"Then how can I locate them?"
"You can trail my brother. Shadow the men also whom you will meet at our home."