Then take down the name and address of every person in the building." "Yes, sir." Before the last word had left his lips, the busy fellow was halfway up the marble steps.

"Lightning," some of his pals called him, perhaps because he was as noiseless as he was quick.

Meanwhile the senior detective had drawn the Curator to one side.
"We'll take a look at these people as they come down.

I have been said to be able to spot a witness with my eyes shut.

Let's see what I can do with my eyes open." "Young and old, rich and poor," murmured the Curator as some dozen persons appeared at the top of the staircase.
"Yes," sighed the detective, noting each one carefully as he or she filed down, "we sha'n't make much out of this experiment.