When rolled out, the map revealed Canton to be shaped like a bell or a dome. The top lay on a hill, to the north, with the apex being marked by the Sea-Calming Tower; the base ran along the river, in a more or less straight line. The citadel’s walls were pierced by sixteen gateways and the area inside was so divided as to form a grid, with streets and avenues of varying width criss-crossing each other in a geometrical fashion.

The map showed the foreign enclave and the official quarter to be separated not only by the city walls but also by miles of densely packed habitations: Fanqui-town was but a tiny pendant, attached to the south-western corner of the citadel. The district where the mandarins and the Manchu bannermen lived was far away in the northern quadrant of the walled city. Canton’s fanquis had always considered themselves fortunate in being well removed from local officialdom – and this was why the location of the High Commissioner’s residence was perceived to be of some significance. When tracked upon the map it was seen to be uncomfortably close to the foreign factories.

‘It is perfectly clear,’ said Dent. ‘He’s steered his flagship to cross our bows. He’s getting ready to deliver a broadside.’

At this Mr Slade puffed up his chest and delivered himself of one of his inspired bursts of eloquence. ‘Well, sir,’ said the Thunderer, ‘our course too is clear now. The foreign community must remain perfectly quiet and passive; let the Chinese authorities act – let them commit themselves to the first step: this is the proceeding they always endeavour to force on their opponents; they know the great advantage it gives them: let us for once, endeavour to gain it.’ Slade paused for effect before uttering his last sentence: ‘We must be the willow, not the oak, in the lowering storm.’

There was an immediate chorus of assent: ‘Quite right!’

‘Well said, John!’

Bahram joined enthusiastically in the chorus: he had worried that the hot-heads amongst the British might choose to take an overly aggressive stand; it came as a relief to hear one of the most aggressive among them expressing moderation.

‘You have shot the bulls-eye John!’ said Bahram. ‘Definitely willow is better for now – why to go for oak already? Better to wait for storm.’

But still the predicted gale held off: the next few days brought instead confusing and apparently directionless cross-winds. There was a brief flurry of anxiety when it came to be known that the Commissioner had asked for several convicted opium-dealers to be produced before him – but the alarm subsided when it was learnt that he had actually commuted the offenders’ sentences. This caused some speculation about whether the Commissioner’s severity may have been somewhat overstated – but that too was confuted by the notice that followed. It was an announcement to the effect that the Yum-chae had left Canton in order to inspect the fortifications of the Pearl River.