"Your orders shall be obeyed," said the older man, his beady eyes
twinkling. "But why, in the name of all that's unheard of, should
collectors come bothering me about luna moths?"

"Because of an announcement to this effect which will appear in the
next number of the National Science Weekly, and in coming issues of
the New York Evening Register."

He handed out a rough draft of this advertisement:

"For Sale--Two largest known specimens
of Tropaea luna, unmounted; respectively
10 and 11 inches spread. Also various
other specimens from collection of late
Gerald Moseley, of Conn. Write for
particulars. Jones, Room 222 Astor
Court Temple, New York."

"What about further danger here?" inquired Mr. Fleming, as Average
Jones bade him good-by. "Would we better run that warning of poor
Moseley's, after all?"

For reply Jones pointed out the window. A late season whirl of snow
enveloped the streets.

"I see," said the old man. "The frost. Well Mr. Mysterious Jones,
I don't know what you're up to, but you've given me an interesting
day. Let me know what comes of it."