Standing with my head up the duct, I chopped at the brickwork above me with hammer and chisel to make three notches that would take the lower ends of the struts. Chips of brick kept flying into my eyes, but the grooves didn't need to be very deep, and after one trial with a length of angle-iron, to make sure it would seat itself properly, we were ready to lift the SCR into place.
As a temporary support, we'd brought an aluminium pole made of short sections that slotted into one another. It was part of another satellite aerial system, and we'd worked out that we could stand it upright, with a circular pad on top, to take the receiver's weight between lifts.
When Pavarotti and I raised the box to waist height, Toad slipped the first section of pole in vertically beneath it.
"OK," he said, 'rest there."
Another lift, to chest height, and he got another section in.
The pole, longer now, started to wobble and flex as it took the weight.
"Keep it steady," said Toad.
A third section propped the receiver at head height. The final hoist, into the shaft, could only be done by one person, pushing up with both arms above his head. I delegated the job to Pavarotti, as he's taller and stronger than me.
"I'll give you what lift I can on the pole," I told him, gripping it with both hands.
"Ready?"
"Right."
"Three, two, one lift!"
Up went the black box, scraping against the sides of the shaft.
Toad snapped one more length on to the bottom of the stalk and said, "OK steady again." While I held the pole in the middle, Pay bent his knees, lowering the box on to the pad.
"Angle-irons next," I said but when I went to slot them into position, I found we still hadn't got the box high enough. We needed another three or four inches to give us the necessary clearance. While Pay and I both grabbed the pole and lifted, Toad slipped his steel tool-box under the bottom and wedged it there. That gave us the space we needed; I got the struts into position, arranged some bubble-wrap padding on top of them, and called to the others to lower gently.
All that had taken a lot of effort and concentration. When I checked my watch I was amazed at how much time had gone by.
Our torch batteries were faltering and needed changing.
"Got to keep moving," I said as we took a quick break for a drink of water. Our next task was to chip out a gully for the coax cables that would connect the SCR to the device another aggravating job at which only one person could work. Again we took it in turns, going all out for a few minutes, then resting. As soon as we had a channel clear Toad moved in to connect the cables, and we went back to our main excavation.
I'd realised that our best plan was to form the spoil from our cavity into a ramp, so that we'd be able to slide the Apple components up it and into position. The trouble with this was, the ramp itself began to get in our way. Digging became progressively more awkward as we had to lean over our own heap to reach the back of the recess. By the time we had a hole of the right dimensions, we were both knackered.
All this time, when he wasn't tinkering with the cables, Toad remained bent over his charges, tightening, adjusting, listening through his headphones. Then, as we paused, I noticed he was into his hand-washing routine again, a curious look on his face.
"What's the matter?"
"Just trying to imagine it all white in here."
"White?"
"When the device is detonated, everything in here will be vaporised in blinding white light."
"Charming. I hope we're not here to see it."
"You wouldn't see anything," he said.
"You wouldn't feel anything. You'd be obliterated, just like that." He snapped his fingers and suddenly, as if he'd conjured up a genie, we became aware of a noise.
"What the.. ?" Pay was crouching beside me on our ramp of spoil. He raised a hand.
"Listen!"
At first we could feel it rather than hear it: a deep vibration more than a sound, a shudder so low that it seemed to come through our boots. But in seconds it built into an audible flutter, then into a rumble, then into a roar which filled the tunnel and made it shake. The water behind us had long since settled back into stillness after our passage through it. Now I saw a ripple on the black surface, and I was convinced that the roof was about to cave in.
I looked round at the concrete blocks behind us. We were trapped between the wall and the water in a section of tunnel about fifteen yards long.
The pulsating roar built up still louder until it seemed to come from right over our heads. Particles of brick dust started to fall from the roof. I looked up at the brickwork right above us, fearful that I'd see water break through the joins, expecting to be swamped any minute. I made a grab for my mask and breathing kit.
Into the din Pay yelled, "Fucking Metro!"
"Bollocks!" I shouted.
"No Metro line anywhere near. I checked it on the street plan."
"Gotta be a boat, then."
"A boat?"
"On the river."
"Some boat."
We were bellowing at the tops of our voices. Toad stood there looking vacant, but I think he was just as scared as we were. Then I realised that the racket was diminishing, and I felt sure Pay was right: a boat had gone up or down the river, close over our heads.
After that scare, it took Toad only a few more minutes to complete his preparations.
"OK," he announced, 'we're ready to go.
Anywhere else, the idea of taking orders from Toad would have made me see red, but here we were entirely in his hands and it didn't bug me at all to follow his instructions. With him directing and helping, we raised the base section of Apple the heavier of the two and eased it sideways on to the rough shelf we'd created. That was relatively simple. The harder part was to lift the top section, turn it over in mid-air, then manoeuvre it into position above its mate without letting the two touch or knock together until they were perfectly aligned. The second part weighed just on 150lbs, and even for two fit guys, holding that amount out at arm's length was no picnic.
Toad had had the simple but brilliant notion of bringing three slender spars of wood, an inch thick, to act as temporary buffers, and he laid these across the top of the base unit so that we could lower the top on to them without letting it touch the metal beneath until we were ready. Then, while Pavarotti and I held up one end of the top component, he withdrew the bars one at a time and we lowered away the last inch. As we stood back, he quickly went to work inserting six stainless-steel bolts one at each corner, one half-way up each long side and carefully screwed them down with a ratchet-handled socket spanner.
Then he plugged one of the two black co-ax cables into the lower half of the package and locked it in position, using an Allen key to turn the sunken nut.
As he took hold of the second wire, I said, "Listen, Toad. Are you quite certain this fucking thing isn't going to go?"
"Don't worry," he replied, not even looking up.
"My instinct for self-preservation's as good as yours.
In went the end of the wire. Again he tightened a nut down.
"OK to cover up?" I asked.
"Hold on. I need to check."
Once more he put on his headphones, lifted a small flap at the bottom corner of the device and plugged in the lead from a control box slung across his stomach. For a minute or two Pay and I waited, running with sweat, itching with the grit that had worked its way down the necks of our shirts. My anxiety about possible premature detonation wouldn't die down. I could only hope to hell Toad knew what he was doing. Glancing sideways at Pavarotti, I could see him thinking the same.