Turning the corner of the wall, he came within sight of the ball room window once more and reached it in the twinkling of an eyelash. To his dismay he found it not only locked, but what was even more terrifying by reason of its significance, shuttered and barred from within! Cleek gave vent to a little cry indicative of mild despair and brought out his torch, letting its tiny searchlight fall upon the smooth lawn in front of him. It could do little more than throw a weak circle of light a few feet into the depths of the trees leaving all beyond and upon either side doubly dark in contrast. But for this Cleek cared nothing, for even as the light streamed out and flung that circle into the impinging mist, there moved across it the figure of a woman with a scarf of gold lace thrown over her head, from beneath which fell a shower of dark, unbound hair. It effectively concealed her face, and almost covered her shoulders wrapped in scarlet satin. Satin in March! And a woman! She was the second woman he had seen cross the lawn that night, the one an hour or so ago, in white, and now this one in scarlet. The thing was so uncanny, so totally unexpected, that Cleek's brain positively reeled. In a flash she was gone. He turned to follow in pursuit, but as he switched on his heel, it was to come face to face with the panting, breathless figure of Mr. Roberts. "Ev--every door--fastened, sir," he said, his breath coming in great gasps. "What on earth's the matter, I dunno. But that's the gospel truth, and I'll swear to it!" "Nothing else to do but to attack the front then," said Cleek. "Come on, Constable. No time to be wasted." CHAPTER IV THE HOUSE OF SHADOWS Constable Roberts did "come on" and at a speed highly commendable, considering his portly build. Cleek, passing the long French windows through which he had obtained entry but an hour before, stopped to ascertain that they, too, were now bolted and barred. Snapping on their electric torches they tore up the short flight of steps leading to the front door. "Someone has made good use of their time," Cleek whispered, as he thought how easily he had entered with Lady Margaret such a short while before. "There's no use trying to force this door and the windows are now shuttered and barred. The only thing to do is to try knocking them up." A second later Mr. Roberts sent a valiant peal resounding through the house and both men listened tensely for any response. One, two, perhaps five minutes passed; the echoes of their blows had died away into silence, and the flash of their torches showed to each of them only the other's strained expectant face. Neither eye nor ear could detect any signs of movement within. "How we're to get in beats me," said Constable Roberts with a frown puckering his bushy brows. "We'll have to break in, in the name of the law."