The lifeblood of London carried a sharp, tinny timbre wholly unlike the rickety, clacking bamboo that underwrote Canton. It was artificial, metallic – the sound of a knife screeching across a sharpening steel; it was the monstrous industrial labyrinth of William Blake’s ‘cruel Works / Of many Wheels I view, wheel without wheel, with cogs tyrannic, moving by compulsion each other’.*
