"Precious little. But if he's your servant how does he find the time to travel for Suck-All Cleaners?"

"He doesn't. That's a put-up job. The head of the firm is a pal of mine, and he employed Jimmy to oblige me. It's answered fairly well on the whole, though Marson - that's the head of Suck-All Cleaners - was very dubious. Said Jimmy wasn't the right type at all."

"I don't know about that," Peter said. "He very nearly sold a cleaner to my elder sister."

Michael looked over his shoulder, grinning. "I know. I don't think he'll ever forgive Malcolm. You know, I'm sorry to have to say so, but you people have been the most ungodly nuisances I ever came across. If you had let Jimmy alone in the house he'd probably have found that sliding panel."

"If it comes to that," Margaret retorted from the rear, "if only you'd told us who you were we shouldn't have got in your way."

"You don't know how much I wanted to. But I couldn't. I was acting in absolute secrecy. I didn't even know at first that you mightn't be mixed up in this. And you must see that for me to have told you all about myself would have been most dangerous. You might have talked, or let something slip out unwittingly." He paused, and signed to them to stand still. They saw that they had reached the end of the passage, and were confronted by a flight of worn stone steps. "Will you stay here?" Michael said. "And don't talk, because I'm going to open the trap." He went softly up the steps, and they waited in silence for him to reappear.

Presently they saw the torch-light approaching again; Michael came into view, and behind him was James Fripp. This individual greeted them with a headshake. "Well, this is a fine set-out, and no mistake," he remarked, with an entire disregard of the manners usually required of a gentleman's servant. "Some people don't seem able to keep out of trouble, and that's a fact."

"Shut up," said Michael. "Some people can't keep their mouths shut, and you're one of them. Do you know, Mr. Fortescue heard you talking once, and set an inquiry agent on to you?"

"That's a nice thing!" exclaimed Mr. Fripp indignantly. "Set one of them busies on to me? Why, I'm as innocent as a babe unborn! And if anyone told you different they're a liar. Most of the police are, barring Mr. Draycott, who ain't as bad as some," he added gloomily.

"Come and see if you can open a door without damaging the lock," Michael interrupted, and began to lead the way back.