that, apart from the servants, thirteen people had congregated there to perform some strange midnight ceremony little over an hour before.
âThink theyâve cleared out?â Rex whispered.
âI doubt it.â The Duke stepped forward and tried the narrow door. It was fast locked.
âCanât we call the police in to raid the place?â
De Richleau shrugged impatiently. âWhat could we charge them with that a modern station-sergeant would understand?â
âKidnapping!â Rex urged below his breath. âIf I were back home Iâd have the strong-arm squad here in under half an hour. Get the whole bunch pinched and gaoled pending trial. Theyâd be out of the way then for a bit, even if I had to pay up heavy damages afterwards, and meantime weâd pop Simon in a mental home till he got his wits back.â
âRex! Rex!â The Duke gave a low, delighted chuckle. âItâs an enchanting idea, and if we
were
in the States I really believe we might pull it off, but here itâs impossible.â
âWhat do you figure to do then?â
âGo in and see if Simon has returned.â
âIâm game, but the odds are pretty heavy.â
âIf weâre caught we must run for it.â
âO.K., but if we fail to make our get-away theyâll call the police and have
us
gaoled for housebreaking.â
âNoâno,â De Richleau muttered. âThey wonât want to draw the attention of the police to their activities, and the one thing that matters is to get Simon out of here.â
âAll right.â Rex placed his hands on his knees, and stooping his great shoulders, leaned his head against the wall. âUp you go.â
The Duke bent towards him. âListen!â he whispered. âOnce weâre inside weâve got to stick together whatever happens. God knows what theyâve used this house of Simonâs for, but the whole place reeks of evil.â
âOh damn!â Rex muttered contemptuously.
âI mean it,â De Richleau insisted. âIf you take that attitude Iâd rather go in alone. This is the most dangerous business Iâve ever been up against, and if itwasnât for the thought of Simon nothing on earth would tempt me to go over this wall in the middle of the night.â
âOh, all right. Have it your own way.â
âYouâll obey me implicitly, every word I say?â
âYes, donât fret yourselfâ¦â
âGood, and remember you are to bolt for it the instant I give the word, because the little knowledge that I possess may only protect us for a very fleeting space of time.â The Duke clambered on to Rexâs shoulders and heaved himself up on to the coping. Rex stepped back a few yards and took a flying leap; next second he had scrambled up beside De Richleau. For a moment they both sat astride the wall peering down into the shadows of the garden, then they dropped silently into a flower-border on the other side.
âThe first thing is to find a good line of retreat in case we have to get out in a hurry,â breathed the Duke.
âWhat about this?â Rex whispered back, slapping the trunk of a well-grown laburnum tree.
De Richleau nodded silently. One glance assured him that with the aid of the lower branches two springs would bring them to the top of the wall. Then he moved at a quick, stealthy run across a small open space of lawn to the shelter of some bushes that ran round the side of the house.
From their new cover Rex surveyed the side windows. No glimmer of light broke the expanse of the rambling old mansion. As the Duke moved on, he followed, until the bushes ended at the entrance of a back yard, evidently giving on to the kitchen quarters.
âHave a care,â he whispered, jerking De Richleauâs sleeve. âThey may have a dog.â
âThey couldnât,â replied the Duke positively. âDogs are simple,