"I see. Then the place is like a huge tube."
"Exactly--and lined entirely with chilled steel. Such few wooden appliances as are necessary for the equipment of the place are thickly coated with asbestos. I made no comment when my uncle rose and walked in there without a word. I never did. For the past six or seven months he had been absorbed in working out the details of a new invention; and I had become used to his jumping up like that and leaving me. We never have supper in this house--my uncle always called it a useless extravagance. Instead, we defer tea until six o'clock and make that the final meal of the day. It was exactly five minutes to seven when I finished my accounts, and as I had had a hard day of it, I decided to go to bed early, after having first taken a walk as far as the old bridge where I hoped that somebody would be waiting for me."
"I know," said Cleek, gently. "I have heard the story. It would be Mr. Charles Drummond, would it not?"
"Yes. He was not there, however. Something must have prevented his coming."
"Before leaving the house, it occurred to me that I ought to look into the laboratory and see if there was anything my uncle would be likely to need for the night, as I intended to go straightway to bed on my return. I did so. He was sitting at his desk, immediately under the one window of which I have spoken, and with his back to me, when I looked in. He answered my inquiry with a curt 'No--nothing. Get out and don't worry me!' I immediately shut the door and left him, returning here by way of the covered passage and going upstairs to make some necessary changes in my dress for the walk to the old bridge. When I came down, ready for my journey, I looked at the clock on the mantel over there. It was exactly seventeen minutes to eight o'clock. I had been a little longer in dressing than I had anticipated being; so, in order to save time in getting to the trysting place, I concluded to make a short cut by going out of the rear door and crossing diagonally through our grounds instead of going by the public highway as usual. I had scarcely more than crossed the threshold when I ran plump into Constable Gorham. As he is rather a favourite with good Mrs. Armroyd here, I fancied that he had been paying her a visit, and was just coming away from the kitchen. Instead, he rather startled me by stating that he had seen something which he thought best to come round and investigate. In short, that, as he was patrolling the highway, he had seen a man vault over the wall of our grounds and, bending down, dart out of sight like a hare. He was almost positive that that man was Sir Ralph Droger. Of course that frightened me almost out of my wits."