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Rh he could see anywhere on the inside of the roof. In fact, it was absolutely concealed and private. Incidentally, the house had originally been built by a gentleman of doubtful sanity, who spent his life observing the spots in Jupiter through a telescope, and having plunged himself and his family into complete penury, sold the house and observatory complete for what he could get. Lakington, struck with its possibilities for his own hobby, bought it on the spot; and from that time Jupiter spotted undisturbed.

With the utmost caution Hugh lowered himself to the full extent of his arms; then he let himself slip the last two or three feet on to the level space around the glass roof. He had no doubt in his mind that he was actually above the secret room, and, on tip-toe, he stole round looking for some spot from which he could get a glimpse below. At the first inspection he thought his time had been wasted; every pane of glass was frosted, and in addition there seemed to be a thick blind of some sort drawn across from underneath, of the same type as is used by photographers for altering the light.

A sudden rattle close to him made him start violently, only to curse himself for a nervous ass the next moment, and lean forward eagerly. One of the blinds had been released from inside the room, and a pale, diffused light came filtering out into the night from the side of the glass roof. He was still craning backwards and forwards to try and find some chink through which he could see, when, with a kind of uncanny deliberation, one of the panes of glass slowly opened. It was worked on a ratchet from inside,