"Tell me your plan."
"I mailed the letter to you."
"Yes."
"I knew you would send a messenger for it."
"Certainly."
"I lay around the post office for your messenger. When she came I followed her here."
"Oh, I see; well, how stupid I am. It is evident I am not a female detective. I never should have thought of that expedient."
"It is a very simple one. If it had been a trap the parties sending the letter would have taken precautions not to be trapped that way."
"I see, yes, I see; well, you are not a dunce after all."
"Thank you. You wished to see me?"