ave heard many stage thunders in my time, but that racket beat
anything and everything this side of siege-guns.

Instantly the door opened and a policeman poked his head in. Before I
had time to move, he grabbed me by the arm and yanked me--into the
ballroom! The girl and I had made a complete circuit of the cellars,
and had stumbled into the ball-room again by the flight opposite to
that by which we left it. Cheerful prospect, wasn't it? The adventure
had ceased to have any droll side to it.

"Aha!" cried the base minion of the law. "_Here_ you are, then!
Hello, everybody! Hello!" he bawled.

Caught! Here we were, the Blue Domino and myself, the Grey Capuchin,
both of us in a fine fix. Discovery and ejection I could have stood
with fortitude and equanimity; but there was bad business afoot. There
wasn't any doubt in my mind what was going to happen. As the girl
said, there would be flaring head-lines and horrid pictures. We were
like to be the newspaper sensation of the day. Arrested and lodged in
jail! What would my rich, doting old uncle say to that, who had
threatened to disinherit me for lesser things! I felt terribly sorry
for the girl, but it was now utterly impossible to help her, for I
couldn't help myself.

And behold! The mysterious stranger I had met in the curio-shop, the
fellow who had virtually haunted me for six hours, the fellow who had
masqueraded as Caesar, suddenly loomed up before me, still wearing his
sardonic smile. At his side were two more policemen. He had thrown
aside his toga and was in evening dress. His keen glance rested on me.

"Here he is, Mr. Haggerty!" cried the policeman cheerfully, swinging me
around.

A detective! And Heaven help me, he believed me to be the thief! Oh,
for Aladdin's lamp!

VI

I stood with folded arms, awaiting his approach. Nonchalance is always
respected by the police. I must have presented a likely picture,
however--my face blackened with coal-dust, cobwebs stringing down over
my eyes, my Capuchin gown soiled and rent. The girl quietly took her
place beside me.

"So you took a chance at the cellars, eh?" inquired the detective
urbanely. "Well, you look it. Will you go with us quietly, or shall
we have to use force?"

"In the first place, what do you and your police want of _me_?" I
returned coolly.

He exhibited his star of authority.

"I am Haggerty of the Central Office. I want you for several things."

Several