"Well, I made her solemnly promise to write every other day, you see,"
explained Bluff, while he suddenly became red in the face, hurrying off
to get his mail.

There were letters for all the boys. Jerry was called in from his
entrancing sport to receive his share, and Frank noticed that he, too,
had a sweet-looking missive in a schoolgirl hand. Of course, it must be
from Mame Crosby, for Jerry and she were great friends.

"Here's something enclosed in my letter, and directed to Mr. Frank
Langdon. Does anybody know a fellow by that name?" asked Will, holding
up a delicate envelope that seemed to exhale a fragrance all its own.

"And sealed, too! What a breach of etiquette!" jeered Jerry.

"Now, _will_ you be good?" observed Bluff, glad of a chance to return
the favor.

"That's all right. Possibly Violet wants to make some inquiries
concerning her twin brother, how he behaves, and if he has developed any
rash spirit calculated to get him into trouble. I remember telling her
that if she felt anxious just to drop me a line, and I'd answer."

Frank unblushingly took the envelope from the extended fingers of Will.

"Open it!" commanded Bluff.

"You'll have to excuse me, fellows. That wouldn't be hardly fair to my
correspondent, you know. She expects me to keep her secrets." And Frank
coolly sauntered off as he spoke.