They went down the steps with the aid of a looped rope which had been threaded through rings bolted into the rock. After another thirty yards the. passage widened to form a low-roofed cave. Ivo asked, his voice sounding unnaturally loud:
'We must be forty feet below ground. How is it ventilated?'
'By shafts. One of them comes up into the concrete bunker built in the war to guard the southern approach to the island. And there are a number of others. The first of them is believed to have been installed by de Courcy. The Devil's Kettle must have had its uses for him.'
In the middle of the floor was an oak trapdoor furnished with two strong bolts. Ambrose drew them back and pulled open the flap. They crowded round and six heads bent to peer down. They saw an iron ladder leading down to a cave. Below them heaved sea water. It was difficult to tell which way the tide was running but they could see the light streaming in from- an aperture shaped like a half moon and they heard for the first time the faint susurration of the sea and smelt the familiar salty seaweed tang. With each wave the water gushed almost silently into the cave and swirled around the rungs of the ladder. Cordelia shivered. There was something remorseless, almost uncanny, about that quiet, regular spouting. Clarissa said:
'Now tell!'
Ambrose was silent for a minute. Then he said:
'It happened in 1940. The island and the castle were taken over by the Government and used as a reception and interrogation centre for foreign nationals of the Axis powers trapped in the United Kingdom by the war, and others, including a number of British citizens who were suspected, at worst, of being enemy agents or at best of being Nazi sympathizers. My uncle was living in the castle with only his one manservant and they were moved out to the cottage in the stable block now occupied by Oldfield. What went on in the castle was, of course, top secret. The internees were only kept here for a relatively short time and I've no reason to suppose that their stay was particularly uncomfortable. A number were released after interrogation and clearance, some went on to internment on the Isle of Man, some I suppose eventually came to less agreeable ends. But George knows more about the place than I do. As Clarissa says, he was stationed here as a young officer for a few months in 1940.'
He paused, but again there was no response. He had spoken as if Sir George were no longer with them. Cordelia saw Roma glance at Ralston, surprised, a little wary. She half opened her mouth then thought better of it. But she kept her gaze on him with a stubborn intensity rather as if she were seeing him for the first time.
Ambrose went on:
'I don't know any of the details. Someone does, I suppose, or as much of the truth as came out. There must be an official record of the incident somewhere although it was never published. All I know is what my uncle told me on one of my rare visits and that was mostly rumour.'
Clarissa permitted herself a display of nicely judged impatience. It was, thought Cordelia, as artificial as the simulated moue of distaste with which she had first regarded the shelf of skulls. Clarissa had no need of impatience; Clarissa knew exactly what was coming.
Ambrose spread plump hands and shrugged, as if resigned to a recital he would prefer to have avoided. But he could have avoided it, thought Cordelia, if he had really tried. And for the first time she wondered whether the conversation, even the visit to the crypt, had been the result of collusion.
He said:
'In March 1940 there were about fifty internees on Courcy and, among them, a hard core of dedicated Nazis most of whom were Germans trapped in Britain at the outbreak of war. They suspected one of their number, a boy of twenty-two, of having betrayed their secrets to the British authorities during interrogation. Perhaps he did. On the other hand, he may have been a British under-cover agent who had infiltrated their group. All I know are rumours, and second-hand rumours at that. What does seem beyond dispute is that the group of Nazis convened a secret court in the crypt of the Church, convicted their comrade of treason and condemned him to death. Then they gagged him, bound his arms and brought him down the passageway to this cave, the Devil's Kettle. As you can see it has a narrow opening which leads to the east cove but the cave is always flooded at high tide. They bound their victim to that iron ladder and left him to drown. He was a very tall young man. He died slowly in the darkness, and he died hard. Later one of them crept back to untie him and let the body float out to sea. When it was washed up only two days later the wrists were cut through almost to the bone. One of his fellow internees told a story of the young man's mounting depression and it was suggested that he had bound his wrists to prevent himself from swimming and had leapt into the sea. None of his judges or executioners ever spoke.'
Roma asked:
'Then how was the story ever known?'
'Someone talked eventually, I suppose, but not until after the war. Oldfield was living in Speymouth at the time and was employed here by the Army. He may have heard rumours. He doesn't admit it now, but someone on the island must have suspected. Someone may even have condoned what happened, or at least closed his eyes. After all, the Army were in charge here. Yet the gang got their hands on the keys to the crypt and the secret passage and managed to return them undetected. That suggests, well, let's say a certain degree of official carelessness on someone's part.'
Clarissa turned to her husband.
'What was he called, darling, the boy who died?'
'His name was Carl Blythe.'
Clarissa turned to the company. Her voice was as out of key as an hysteric:
'And the most extraordinary thing is that he was English – well,
his father was anyway, his mother was German – and George
was at school with him, weren't you, darling? They were both at
Melhurst. He was three years older and rather a horrid boy,
cruel really, one of those bullies who make other boys' lives a
torment to them, so he and George weren't exactly friends. In
fact George hated him. And then to find him here and at his
mercy. Wasn't it odd?'
Ivo said easily:
'Not particularly. The British public schools produced their share of Nazi sympathizers and this is where you'd expect to find them in 1940.'
Cordelia stared down at the iron ladder. The light in the passage, fierce and garish, did nothing to mitigate the horror; rather it intensified it. In the old days, the cruelty of man to man was decently shrouded in darkness; the mind dwelt on airless unfit dungeons, on light filtering through the slits of narrow windows. But the modern interrogation rooms and torture chambers were ablaze with light. The technocrats of pain needed to see what they were at. Suddenly the place became intolerable to her. The chill of the passageway intensified. She had to tauten her arms and clench her fists to prevent herself visibly shaking. In her imagination the tunnel behind them stretched to infinity and they were doomed to rush down its contracting brightness like terrified rats. She felt a bead of sweat roll down her forehead and sting her eyes and knew that it had nothing to do with the cold. She made herself speak, hoping that her voice didn't betray her.
'Can't we get out of here? I feel like a voyeuse.'
Ivo said:
'And I feel cold.'
Taking her cue promptly, Clarissa shivered. Then Sir George spoke for the first time. Cordelia wondered whether it was her confused senses or the echo from the low roof which made his voice sound so different.
'If my wife has satisfied her curiosity perhaps we might go.'
Then he made a sudden jerk forward. Before they could guess what was coming he put his foot behind the open trapdoor and pushed. It crashed down. The walls seemed to crack and the passage shook under their feet. They must all have cried out, their voices thin screams in the echoing, reverberating roar. When it had faded no one spoke. Sir George had already turned on his heel and was making his way towards the entrance.