Where the famous tulip beds made splotches of brilliant colour against the clear emerald of the closely clipped grass they came upon him—a solitary figure in the garb of the elderly seaman, "Captain Burbage, of Clarges Street"—seated on one of the garden benches, his hands folded over the knob of his thick walking-stick and his chin resting upon them, staring fixedly at the gorgeous flowers and apparently deaf and blind to all else.

He was not, however; for as the superintendent approached he, without altering his gaze or his attitude in the slightest particle, said with the utmost calmness: "Superb, are they not, my friend? What a pity they should be scentless. It is as though Heaven had created a butterfly and deprived it of the secret of flight. Walk on, please, without addressing me. I am quite friendly with that policeman yonder and I do not wish him to suspect that the elderly gentleman he is so kind to is in any way connected with The Yard. Examine the tulips. That's right. You came in your limousine, of course? Where is it?"

"Just outside the gates, at the end of the path on the right," replied Narkom, halting with Sir Henry and appearing to be wholly absorbed in pointing out the different varieties of tulips.

"Good," replied Cleek, apparently taking not the slightest notice. "I'll toddle on presently, and when you return from inspecting the flowers you will find me inside the motor awaiting you."

"Do, old chap—and please hurry; time is everything in this case. Let me
introduce you to your client. (Keep looking at the flowers, please, Sir
Henry.) I have the honour to make you acquainted with Sir Henry Wilding,
Cleek; he needs you, my dear fellow."

"Delighted—in both instances. My compliments, Sir Henry. By any chance that Sir Henry Wilding whose mare, Black Riot, is the favourite for next Wednesday's Derby?"

"Yes—that very man, Mr. Cleek; and if—"

"Don't get excited and don't turn, please; our friend the policeman is looking this way. What's the case? One of 'nobbling'? Somebody trying to get at the mare?"

"Yes. A desperate 'somebody,' who doesn't stop even at murder. A very devil incarnate who seems to possess the power of invisibility, and who strikes in the dark. Save me, Mr. Cleek! All I've got in the world is at stake, and if anything happens to Black Riot, I'm a ruined man."

"Yar-r-r!" yawned the elderly sea captain, rising and stretching. "I do believe, constable, I've been asleep. Warm weather, this, for May. A glorious week for Epsom. Shan't see you to-morrow, I'm afraid. Perhaps shan't see you until Thursday. Here, take that, my lad, and have half-a-crown's worth on Black Riot for the Derby; she'll win it, sure."