"I can soon find out!" Will declared.

The cutting had been done between the second level and the top. The
ladders below seemed perfectly safe. After testing them thoroughly,
Will trusted himself on one of the rungs and let himself down slowly,
bearing as much weight as was possible on the standards.

He was at the bottom in a moment, and in another moment stood by the
side of his chums with the saw in his hand.

"I don't think that's so very much!" Tommy exclaimed.

"Right here, then," Will explained, "is where you get your little
Sherlock Holmes lesson! This is a new saw, as you all see. It
probably never was used before. Now the man who did the cutting
bought this at some nearby store. Don't you see what it means?"

"That's a fact!" cried Tommy. "We can find out who bought the saw,
and so discover the gink who tried to commit murder by sawing the
ladders."

"And look here," Will went on, "do you see these threads hanging to
the teeth of the saw? Do you see the color?"

"Blue!" replied the boys in a breath.

"That's right, blue. Now, what sort of a suit did the detective wear
this morning? It was blue, wasn't it?"