The birds were not feeding. There was no swooping nor squabbling over a six-legged crumb, nor any sign in the lower air of the insect life that might have attracted these numbers. The birds were simply circling. Some of the smaller species, sparrows and finches, had tired of flying and now lined rooftops and fences, leaving their larger brethren - carrion-crows, magpies, gulls to occupy the heights. There was no scarcity of pigeons here either; the wild variety banking and wheeling in flocks of fifty or more, their shadows rippling across the rooftops. There were some domesticated birds too, doubtless escapees like 33. Canaries and budgerigars: birds called from their millet and their bells by whatever force had summoned the others. For these birds being here was effectively suicide. Though their fellows were at present too excited by this ritual to take note of the pets in their midst, they would not be so indifferent when the circling spell no longer bound them. They would be cruel and quick. They'd fall on the canaries and the budgerigars and peck out their eyes, killing them for the crime of being tamed.

But for now, the parliament was at peace. It mounted the air, higher, ever higher, busying the sky.

The pursuit of this spectacle had led Cal to a part of the city he'd seldom explored. Here the plain square houses of the council estates gave way to a forlorn and eerie no-man's-land, where streets of once-fine, three-storey terraced houses still stood, inexplicably preserved from the bulldozer, surrounded by areas levelled in expectation of a boomtime that had never come; islands in a dust sea.

It was one, of these streets - Rue Street the sign read - that seemed the point over which the flocks were focused. There were more sizeable assemblies of exhausted birds here than in any of the adjacent streets; they twittered and preened themselves on the eaves and chimney tops and television aerials.