"Anyhow I can't make her hear, and the old fool's left her door locked," said Nettleton.

"That's a bad plan," said I, not to score a silly point, but simply because I had to say something with conviction. It was a mistake. Nettleton peered at me by the light from the nearest lamp-post.

"Have you seen anything of her?" he asked suspiciously.

"Yes!" I answered, in obedience to the same necessity of temperament.

"Well?" he cried.

"Well, she seemed nervous about something, and I believe she has gone to her own people for the night."

We stood without speaking for nearly a minute. A soft step came marching round the asphalt curve, throwing a bright beam now upon its indigo surface, and now over the fussy fronts of the red houses, as a child plays with a bit of looking-glass in the sun. "Good-night, officer," said Nettleton as the step and the light passed on. And I caught myself thinking what an improvement the asphalt was in Witching Hill Road, and how we did want it in Mulcaster Park.

"We can't talk out here, and I wish to explain about this wretched rent," said Nettleton. "Come in—or are you nervous too?"

I gave the gate a push, and he had to lead the way. I should not have been so anxious to see a real child in front of me. But Nettleton turned his back with an absence of hesitation that reassured me as to his own suspicions, and indeed none were to be gleaned from his unthoughtful countenance when he had lit up his hall without waiting for me to shut the front door. At that I did shut it, and accepted his invitation to smoke a pipe in his den; for I thought I could see exactly how it was.

Nettleton, having found his candles out and his servant flown, having even guessed that I knew something and perhaps suspected more, was about to show me my mistake by taking me into the very room where the conflagration had been laid for lighting. Of course I should see no signs of it, and would presently depart at peace with a tenant whose worst crime was his unpunctuality over the rent. Nothing could suit me better. It would show that the house really was safe for the night, while it would give time for due consideration, and for any amount of conferences with Uvo Delavoye.