of the strip of carpet leading to the chair with a magnifying-glass?"

"Hadn't got a magnifying-glass."

"Then you'd better buck up and get one, if you're going to be a
detective. Do you think Sherlock Holmes ever moved a step without his?
Not much. Well, anyhow. Did you find any foot-prints or tobacco-ash?"

"There was a jolly lot of dust about."

"Did you preserve a sample?"

"No."

"My word, you've a lot to learn. Now, weighing the evidence, does
anything strike you?"

"No."

"You're a bright sort of sleuth-hound, aren't you! It seems to me I'm
doing all the work on this case. I'll have to give you another leg-up.
Considering the time when the quid disappeared, I should say that
somebody in the dormitory must have collared it. How many fellows are
there in Evans' dormitory?"

"I don't know."

"Cut along and find out."

The detective reluctantly trudged off once more.