"When he had gone, I ran back again, and saw the men passing, one after another, through an opening in the stairs, formed by one of the marble steps being raised. When the last man had vanished, the slab that made the step was shut down, and there was not a sign of the secret door. It was the seventh step from the bottom, as I took care to count: and a splendid idea; for it was so solid that it did not ring hollow, even to a fairly heavy hammer, as I found later. "There is little more to tell. I got out of the house as quickly and quietly as possible, and back to the inn. The police came without any coaxing, when they knew the 'ghosts' were normal flesh and blood. We entered the park and the Manor in the same way that I had done. Yet, when we tried to open the step, we failed, and had finally to smash it. This must have warned the haunters; for when we descended to a secret room which we found at the end of a long and narrow passage in the thickness of the walls, we found no one. "The police were horribly disgusted, as you can imagine; but for my part, I did not care either way. I had 'laid the ghost,' as you might say, and that was what I set out to do. I was not particularly afraid of being laughed at by the others; for they had all been thoroughly 'taken in'; and in the end, I had scored, without their help. "We searched right through the secret ways, and found that there was an exit, at the end of a long tunnel, which opened in the side of a well, out in the grounds. The ceiling of the hall was hollow, and reached by a little secret stairway inside of the big staircase. The 'blood-drip' was merely colored water, dropped through the minute crevices of the ornamented ceiling. How the candles and the fire were put out, I do not know; for the haunters certainly did not act quite up to tradition, which held that the lights were put out by the 'blood-drip.' Perhaps it was too difficult to direct the fluid, without positively squirting it, which might have given the whole thing away. The candles and the fire may possibly have been extinguished by the agency of carbonic acid gas; but how suspended, I have no idea. "The secret hiding paces were, of course, ancient. There was also, did I tell you? a bell which they had rigged up to ring, when anyone entered the gates at the end of the drive. If I had not climbed the wall, I should have found nothing for my pains; for the bell would have warned them had I gone in through the gateway." "What was on the negative?" I asked, with much curiosity. "A picture of the fine wire with which they were grappling for the hook that held the entrance door open. They were doing it from one of the crevices in the ceiling. They had evidently made no preparations for lifting the hook. I suppose they never thought that anyone would make use of it, and so they had to improvise a grapple. The wire was too fine to be seen by the amount of light we had in the hall; but the flashlight 'picked it out.' Do you see?