“I would, if I were you,” said Frank, quietly, but with some determination.
“You would?” asked Bart, in some surprise.
“Sure. I think there’s something back of this,” went on Frank. “If I were Fenn I’d enter into a correspondence with him, and try to find out what was at the bottom of it.”
“What do you think it is?” asked Ned. “Let’s make another examination of the letter, detective style, and see what we can deduce from it.”
“I think the man who wrote that letter is the same man we have met several times—the mysterious stranger who entered the school—the man who stole the diamond bracelet,” spoke Frank, quickly.
“Then if you’ve got it all figured out, we don’t need to puzzle over this letter,” decided Ned.
“Oh, I don’t say I’m altogether right,” came from Frank quickly. “That’s only one theory.”
“And I think it a good one,” added Bart. “Fenn, suppose you answer this letter, and leave your reply in the dead sycamore tree.”
“What shall I say?” asked the heavy-weight chum.