"Yes—and who blew up the 'Rambler.'"
"And who took the 'Nimrod.'"
"And—and—Say, fellows, this everlasting mystery is positively getting on my nerves," said Dick. "Can't we do something to clear it up?"
"We must."
"One sure thing," replied Bob, "they don't want us to continue our trip."
The five boys were so interested in their discussion that the afternoon slipped away almost before they knew it.
A light, quick step outside suddenly brought all conversation on the subject to an end. Another instant, and Nat entered the room.
"Hello, where have you been for such a long time?" asked Bob, carelessly.
"For one thing, took in a lot of moving picture shows," replied Nat, without hesitation. "Didn't expect to find you fellows here until about grub time, anyway."
"Come on, fellows," put in Dave; "that reminds me. A nice piece of roast and some mashed potatoes would go pretty well just now."