Occasionally they triumphed, and some frantic nightingale or Rudewood finch would be smothered with rough cloth to a chorus of ludicrously overblown cheers. Hornets buried their harpoons into their tormentors as they were swept into jars and pots. If they were lucky, their captors remembered to pierce airholes in the lids.

Many birds and more insects died. Some survived, to be taken into the dark city just beyond the trees.

In the city itself, children scaled walls to pull eggs from nests in decaying gutters. The caterpillars and maggots and cocoons they kept in matchboxes and bartered for string or chocolate were suddenly worth money.

There were accidents. A girl in pursuit of her neighbour’s racing pigeon fell from a roof, breaking her skull. An old man scrabbling for grubs was stung by bees until his heart stopped.

Rare birds and flying creatures were stolen. Some escaped. New predators and prey briefly joined the ecosystem in New Crobuzon’s skies.

Lemuel was good at his job. Some would only have plumbed the depths: not he. He made sure that Isaac’s desires were communicated uptown: Gidd, Canker Wedge, Mafaton and Nigh Sump, Ludmead and The Crow.

Clerks and doctors, lawyers and councillors, landlords and men and women of leisure . . . even the militia: Lemuel had often dealt (usually indirectly) with New Crobuzon’s respectable citizenry. The main differences between them and the more desperate of the city’s inhabitants, in his experience, were the scale of money that interested them and the capacity they had not to get caught.

From the parlours and dining rooms there were cautious murmurings of interest.

In the heart of Parliament a debate was taking place about levels of business taxation. Mayor Rudgutter sat regally on his throne and nodded as his deputy, MontJohn Rescue, bellowed the Fat Sun party’s line, poking his finger aggressively across the enormous vaulted chamber. Rescue paused periodically to rearrange the thick scarf he wore around his neck, despite the warmth.

Councillors dozed quietly in a haze of dust motes.

Elsewhere in the vast building, through intricate corridors and passages that seemed designed to confuse, suited secretaries and messengers brushed busily past each other. Little tunnels and stairs of polished marble bristled from main thoroughfares. Many were unlit and unfrequented. An old man pulled a decrepit trolley along one such passage.

With the bustling noise of Parliament’s main entrance hall receding behind him, he dragged the trolley behind him up steep stairs. The corridor was barely wider than his trolley: it was a long, uncomfortable few minutes until he had reached the top. He stopped and wiped sweat from his forehead and around his mouth, then resumed his trudging plod along the ascending floor.