I knew it must be the entrance to Great-aunt Sarah's tunnel.
The blocks of stone now came in handy as they were from twelve to eighteen inches square, and were not too heavy for Sally to lift with an effort. By piling them up she made a seat for me, so that while she held the torch I could get to work on the lock.
It is no light task to cut through a three inch thick panel of ancient oak, and after I had been at it for a little while I marvelled that Sally had managed to get as far as she had in the time. Nearly two hours elapsed before I had completed the square round the lock, and by the time I had hammered back the remaining bolt it must have been three in the morning.
Having brushed ourselves down, we made ready for the next stage of our arduous journey. Sally put her shoulder against the door and heaved. With a loud groan of rusty hinges it gave, and reluctantly opened a couple of feet. As it did so I felt a chill draught come through from the chapel.
Instantly I knew that all our labours had been in vain; for at the same second a wave of nausea flooded through me. I was still seated on the pile of stone. As I leaned sideways to look past Sally I heard her give a sob; then I saw what she had already seen and knew that my fears were only too well founded. The Great Spider was crouching in the middle of the aisle.
The moonlight streamed through a rent in the roof right on to the monster. Between its forefeet it held a dead cat, and it had evidently been making a meal off the cat's entrails, as they hung out from its torn stomach on to the floor; but the noise of the opening door had drawn our enemy's attention to us. Flinging aside the dead cat the black, hairy brute bounded in our direction.
Simultaneously, Sally and I grabbed the door and hauled it shut again. Then, falling on her knees beside me, she gave way to her distress in a flood of bitter tears. It was hard indeed to find our escape route barred by that hideous sentinel and, although I tried, there was little I could say to comfort her.
Afterwards, it did occur to me that if we could have gone boldly out into the chapel hand in hand the strength of our love might have created an aura that would have driven the brute back. But I could not stand alone for more than a moment, and I would not have let Sally face that incredibly evil thing with me dragging along behind her. At the time, to beat a retreat seemed the only possible course open to us.
When Sally had recovered a bit we began the ghastly business of getting back up the stairs. The eighteen or twenty steps that we had meant to go up on the far side of the chapel to its lakeshore entrance would have proved a bad enough ordeal, but here there were more than double that number. Leaning on Sally's back, I had been able to come down a step at a time, but I was much too heavy for her to carry and it was beyond my own powers to take a single step upward.
We started by my clinging to her waist while she dragged me behind her, and got up about ten steps that way. But the strain on her was frightful; and when she could no longer suppress a loud moan from the pain in her ankle, I refused to let her pull me any further.
I tried pulling myself up, but as there was nothing ahead of me to grip except the smooth stones, and my knees were useless, I had to abandon the attempt. Then, turning round, I used my arms as levers to lift myself backwards from step to step. By the time I was halfway up I felt as though my arms were being wrenched from their sockets, and I could not possibly have got much further had not Sally come to my assistance. She went up backwards, too, behind me, and, stooping almost double, got her hands under my armpits so that she could heave every time I lifted. We managed that way, and at last she got me back to my room, but the final effort of supporting me to my bed proved too much for her, and as I flopped on to it she fainted.
She slipped to the floor near enough for me to sprinkle water from my bedside carafe on her face, and to my relief she soon came round sufficiently to pull herself up on to the bed beside me. We remained like that for a while, getting our strength back and wondering miserably what we should do next.
To attempt our original plan, of going down the spiral staircase, was out of the question. We were both deadbeat already, and Sally's ankle was paining her so much that she would have fainted again before we were a quarter of the way down it. So there seemed nothing for it but that I should resign myself to remaining where I was, and facing whatever was coming to me.
Suddenly I remembered that we had lowered my wheelchair over the battlements. It was much too heavy for us to pull up again, and I could not possibly have got it down to the lakeside by myself. When that was discovered as it must be first thing in the morning it would be realised that someone had aided me in an abortive attempt to escape; and suspicion could point only to Sally.
When I told her my new fear she laughed a little bitterly. 'You poor sweet; don't fret about that. Surely you realise that I have burnt my boats already. By sending that telegram to Mia I disclosed the fact that I am on your side. But she is not; and she only brought Dr. Arling to hear what I had to say this afternoon to keep me from suspecting that they are both in this plot against you. Since we have failed to escape it is certain now that they will prevent my seeing you again, and do their best either to bribe or browbeat me into acknowledging that I was quite mistaken about your being sane.'
That gave me furiously to think. I felt convinced that Helmuth and Co. were capable of going to any lengths to ensure that Sally held her tongue. The business of the chair would give it away that her interest in me was not merely one of wanting to assure fair play for her patient; but that she was actively endeavouring to get me out of Helmuth's clutches. That presupposed that I had told her the whole story, and that she believed me. In that case they could not possibly afford to let her leave Llanferdrack, and, therefore, she was now in grave danger.
I told her that, and added: 'There is only one thing to do, darling. You can't get me out, but you can get out yourself. You must go downstairs, collect the few things that you feel you will be able to carry, and slip away before daylight.'
She shook her head. 'I'm damned if I will, Toby! What do you take me for? I love you; and I'm going to stay and fight these bloody people with you.'
For a quarter of an hour we wrangled fiercely over that. I alternately begged and ordered her to leave me; she refused to listen to my arguments and insisted on remaining. At length we agreed on a compromise. She should not return to her room, where she might find herself at their mercy, but lead them to suppose that she had got the wind up and cleared out. Actually she would retire into hiding behind the secret panel, so that she could hear all that went on in my room and render me any assistance that she could.
By the time the issue had been settled it was after four o'clock. The moon was down, so Sally lit a candle. The sweat had dried on us, caking the dirt, and we looked like a couple of sweeps. Anyone who saw me would have known at once that I must have been burrowing in some dirty hole, and the last thing we wanted was for Helmuth to start hunting for a secret passage. So Sally helped me to undress and got me properly back to bed, then brought me the basin and ewer from the washstand.
We made a cross on the water to prevent bad luck and washed our faces and hands. She threw the dirty water out on to the terrace, shut the door and unbolted the one to the spiral stairs.
Before she left me we arranged that if I gave one knock on the panel that would be the danger signal; she would know that I had heard someone coming upstairs and that she must remain quite still in case they heard her. If I gave two knocks that would be the signal that the coast was clear again, and I would knock three times if I wanted her to come out.