Lord Robert was among the last to go.

He asked several people, rather plaintively, if they had seen Mrs Halcut-Hackett. ‘I’m supposed to be taking her home.’

Dimitri came up to him.

‘Excuse me, my lord, I think Mrs Halcut-Hackett has just left. She asked me if I had seen you, my lord.’

Lord Robert blinked up at him. For a moment their eyes met.

‘Oh. Thank you,’ said Lord Robert. ‘I’ll see if I can find her.’

Dimitri bowed.

Lord Robert walked out into the mist.

His figure, looking a little like a plump antic from one of Verlaine’s poems, moved down the broad steps. He passed a crowd of stragglers who were entering their taxis. He peered at them, watched them go off, and looked up and down the street. Lord Robert walked slowly down the street, seemed to turn into an insubstantial wraith, was hidden for a moment by a drift of mist, reappeared much farther away, walking steadily into nothingness, and was gone.

In his room at the Yard Alleyn woke with a start, rushing up on a wave of clamour from the darkness of profound sleep. The desk telephone was pealing. He reached out for it, caught sight of his watch and exclaimed aloud. Four o’clock! He spoke into the receiver.

‘Hullo?’

‘Mr Alleyn?’

‘Yes.’

He thought: ‘It’s Bunchy. What the devil—!’

But the voice in the receiver said:

‘There’s a case come in, sir. I thought I’d better report to you at once. Taxi with a fare. Says the fare’s been murdered and has driven straight here with the body.’

‘I’ll come down,’ said Alleyn.

He went down thinking with dismay that another case would be most unwelcome and hoping that it would be handed on to someone else. His mind was full of the blackmail business. Bunchy Gospel wouldn’t have said he’d found his man unless he was damn certain of him. The cakes-and-ale fellow. Dimitri. Well, he’d have opportunities, but what sort of evidence had Bunchy got? And where the devil was Bunchy? A uniformed sergeant waited for Alleyn in the entrance hall.

‘Funny sort of business, Mr Alleyn. The gentleman’s dead all right. Looks to me as if he’d had a heart attack or something, but the cabby insists it was murder and won’t say a word till he sees you. Didn’t want me to open the door. I did, though, just to make sure. Held my watch-glass to the mouth and listened to the heart. Nothing! The old cabby didn’t half go off pop. He’s a character.’

‘Where’s the taxi?’

‘In the yard, sir. I told him to drive through.’

They went out to the yard.

‘Dampish,’ said the sergeant and coughed.

It was very misty down there near the river. Wreaths of mist that were almost rain drifted round them and changed on their faces into cold spangles of moisture. A corpse-like pallor had crept into the darkness and the vague shapes of roofs and chimneys waited for the dawn. Far down the river a steamer hooted. The air smelt dank and unwholesome.