“Who on earth is Piggy?” said Jane.

“Sir Julian Le Mesurier, my chief. Every one calls him Piggy. I must see him about Tony, and I also want to report what I told you about the passages being wired and in use. I’ll try and see Tony again before I go. You see the thing is, I don’t know how far Raymond is involved, and I want to get her out of the way. Tony’s the only man who can get her out of the way. I suppose I ought to go through all the passages to-night, but I’m not going to. I shall tell Piggy why. As a matter of fact, he’ll be just as keen as I am on getting Raymond out of it. Once she’s clear, we can come down on Ember like a cartload of bricks and smash up any devilry he may have been contriving. Now do you see why you must keep clear? I can’t possibly do my job if I’m torn in bits about your running into danger. And next time you went feeling along these passages you might really run into your friend Ember, you know.”

“I won’t unless I’ve got to,” said Jane. “You don’t imagine I like green slime, and slugs, and the pitch dark, do you? But I won’t promise. Now I’m going. Good-bye, Henry.”

“You’re an obstinate little devil, Jane,” said Henry.

Jane gave a little gurgling laugh.

“We haven’t made an assignation yet,” she said. “When are you coming back?”

“Well, I’ve made an appointment with Tony for to-morrow night, but I’ll try and catch him now and put that off for twenty-four hours. If for any reason I have to come down sooner, I will come and tap on your cupboard door. If I’m not there by midnight to-morrow, don’t expect me. But I’ll be there for certain the following night—let me see, that’s Sunday.”

“But if you don’t come?”

“I will.”

“Well, just supposing something prevented you?”