And childish tantrums, Nicholas had discovered, at first to his embarrassed surprise, and then with secret amusement. Even the most brilliant of men had character flaws.

Launde Abbey wasn't just about profound reasoning and scaling new heights of metaphysics. The human dynamics of six young people cooped up with an increasingly crotchety sixty-seven-year-old was weird. Fun, but weird.

Nicholas could now see a tributary network of steely rivulets coalescing on the grassland, trickling across the road and running down the slope into the first of the three little lakes to the north. The rain was incredibly heavy, and Globecast's news channel said it would last for six or seven hours. The River Chater at the bottom of the valley would flood again; it was probably up to the rickety little bridge already.

There was some sort of vehicle crawling along the road, heading down towards the river. He frowned and peered forward, nose touching the chilly glass. It was a rugged four-wheel-drive Suzuki jeep. Probably the farmer who leased the park's grazing rights checking to make sure he'd rounded up all the sheep and llamas.

Lightning burst across the valley, ragged sheets of plasma ripping the gloom apart. It revealed the small powder-blue composite geodesic dome sitting like some baroque technological sentry on the brow of the valley. Nicholas could see a couple of the hexagonal panels were missing. The gravity wave detector which it housed was now long abandoned. In the height of summer sheep used the dome for shade.

Another bout of lightning erupted overhead, vivid blue-white forks lashing down, giving him the impression that the sky itself was fracturing. One of the flashes was bright enough to dazzle him and he jerked back from the window, fists rubbing the blotchy purple after-images from his eyes.

Thunder rattled the glass. The farmer's vehicle had gone. Humidity was steaming up the windows.