"Many thanks, Bobby; many thanks, everybody!" sang out the red-headed man. "Let her go, chauffeur. The camera men will pick us up again at Whitehall, in a few minutes' time."

"Right you are, sir," responded the chauffeur gaily. Then "toot-toot" went the motor-horn as the gentleman in grey closed the door upon himself and his companion, and the vehicle, darting forward, sped down the Embankment in the exact direction whence the man himself had originally come, and, passing directly through that belated portion of the hurrying crowd to whom the end of the adventure was not yet known, flew on and—vanished.

And Collins, stooping to pick up the half-sovereign that had been thrown him, felt that after all it was a poor price to receive for all the jeers and gibes of the assembled onlookers.

"Smart capture, Bobby, wasn't it?" sang out a deriding voice that set the crowd jeering anew. "You'll git promoted, you will! See it in all the evenin' papers—oh, yus! ''Orrible hand-to-hand struggle with a desperado. Brave constable has 'arf a quid's worth out of an infuriated ruffin!' My hat! won't your missis be proud when you take her to see that bloomin' film?"

"Move on, now, move on!" said Collins, recovering his dignity, and asserting it with a vim. "Look here, cabby, I don't take it kind of you to laugh like that; they had you just as bad as they had me. Blow that Frenchy! She might have tipped me off before I made such an ass of myself. I don't say that I'd have done it so natural if I had known, but—Hullo! What's that? Blowed if it ain't that blessed whistle again, and another crowd a-pelting this way; and—no!—yes, by Jupiter!—a couple of Scotland Yard chaps with 'em. My hat! what do you suppose that means?"

He knew in the next moment. Panting and puffing, a crowd at their heels, and people from all sides stringing out from the pavement and trooping after them, the two "plain-clothes" men came racing through the grinning gathering and bore down on P.C. Collins.

"Hullo, Smathers, you in this, too?" began he, his feelings softened by the knowledge that other arms of the law would figure on that film with him at the Alhambra to-night. "Now, what are you after, you goat? That French lady, or the red-headed party in the grey suit?"

"Yes, yes, of course I am. You heard me signal you to head him off, didn't you?" replied Smathers, looking round and growing suddenly excited when he realized that Collins was empty-handed, and that the red-headed man was not there. "Heavens! you never let him get away, did you? You grabbed him, didn't you—eh?"

"Of course I grabbed him. Come out of it. What are you giving me, you josser?" said Collins with a wink and a grin. "Ain't you found out even yet, you silly? Why, it was only a faked-up thing—the taking of a kinematograph picture for the Alhambra. You and Petrie ought to have been here sooner and got your wages, you goats. I got half a quid for my share when I let him go."

Smathers and Petrie lifted up their voices in one despairing howl.