epeated, "one may learn a great deal from dust. Take a vacuum cleaner now. It's queer. I've helped clean dozens of furnished houses and apartments after the tenan

!" He drew a stout paper sack from his pocket. Unfastening the cloth dust-bag

nny, "What can y

aid Goggles,

st," Johnny grumbled. "Can'

presence of that airplane above Hillcrest baseball grounds on that day when the myster

ey were!" he had told himself. "

he manner in which these men might be fou

anything?

ard. They live here. They're strangers in town. They'd rent

they were looking for. The description of the two men who had rented

tch-the men had check

at they may do. It's my theory that they have a grudge of some sort against the 'Prince.' He's got to pitch so

them?" Goggles had asked.

s what w

them. It doesn't matter that they're gone. Left all sorts of clues behind

ously collecting dust while Johnny tiptoed softly from room to room, pulling o

"What good is a lot

e end of this was a threaded attachment that apparently just fitted into the small end of the other object. This second object was a funnel-sha

cts were quickly transferred to the inner poc

too soon, for from below came the sound

re cleanin' the

ohnny's spine. It was the voice of a

nsteady and weak. "I do this sort of thing q

me and my pardners here moved out of this place a short while

ht," a second gr

you got 'em all cleaned up for us." Goggles had found a pair

oggles' voi

voice again. "We'll just get on into the l

ke a rabbit that has sighted a dog, he was up and silently away. In truth he

nt later he heard one of the strangers

esser drawer in that little bed

room." Goggles stammered a little

the speaker turned on his heel and left

five minutes later, "Wh

k-. Come on! Let's get out of

t w

they came

Goggles hel

I say, l

d reluctantly. "Guess I've

y to Goggles' basement where he had rigg

ve a look at that stuff from the sweeper." He emptied the

ime naming his findings: "Hairs, dark ones, three or four of them. Their hair is dark. That don't matter; bu

y replied. "Broug

umped coarse dirt on a second paper. "Came from the bottom of those shoes," he explained. "Yes, there

mething," Johnny

ng to do about i

can't keep people from

ome sort of chemical in this dust from the sweeper. Two

der is in the dust I took from the pocket of an old coat they left. Must ha

trol his voice, "could you make a brig

could! All k

e those chemicals from the rest of the dust as well as yo

down to the laboratories. I'll ask someone to test 'em o

Prince'?" Johnn

He isn't half bad," ad

t!" Johnny put his cap on. "All rig

ny drew two objects from h

irplane. The eagle got a rabbit. The airplane got a man. It was no accident that th

it in for the 'Prince.' I wonder why? T

d stoutly, "I'm for the 'P