"When did you meet him last?"
"'Bout this time last night."
"Exactly; on a vacant lot—?"
"Eh?"
The tramp started and evinced alarm.
"Don't worry, old fellow," uttered the detective in a low voice. "I know all about it, my friend. You were to meet a gentleman here by appointment?"
"Yes."
"I am the man."
"You?" incredulously.
"Yes. Mr. Barkswell couldn't come, and so he sent me to take his place. I would like mighty well to see you in private for a few minutes."