‘Dash it all, Cassandra, we’re in Belgravia not Belfast!’ he objected.

Lady Dedham quelled her husband’s predictable splutterings by her usual method of putting a finger firmly over his mouth. ‘And thank God for that! But your young friend at the Yard is worth hearing. It’s a very simple arrangement. It makes complete sense. We must prepare ourselves to observe this routine until all the unpleasantness blows over or you and that fire-eater Churchill stop making sabre-rattling speeches, darling, whichever is the sooner. Yo u it was who insisted on dismissing the police protection squad Joe kindly set up for you, and now you must perform your part of the bargain.’

‘Protection squad!’ The admiral spat out his derision.

‘He didn’t have to do that, you know — over and above his duty. You’re an ungrateful piggy-wig, Oliver. You listen to no one. I can’t think why you objected. Those Branch men he sent round were terribly discreet … really, you’d no idea they were there. And the young one was incredibly handsome! I was so enjoying having him about the place. He cheered us all up.’ She weathered his splutter of outrage and sailed on. ‘But you agreed to the commander’s alternative proposals and I for one shall hold you to your promise. I have a part too, you know, and I fully intend to play it. I expect nothing less from you. Now — tell the driver what you want him to do. And don’t cut it short — I shall be listening!’

The taxi pulled up in front of a late Georgian house on the northern side of the park-like boulevard that was Melton Square. Heavily porticoed balconies and densely planted patches of garden gave these houses an air of discreet dignity. Dedham looked about him with satisfaction at the solid grandeur, the sedate Englishness, the well-lit pavements, of what he considered to be the heart of London. Nothing truly stirring had happened, in public at least, here in the Five Fields since the Earl of Harrington’s cook had been set upon and beaten to death by highwaymen a century before. Since the arrival of the gas-lamps, the only crimes hereabouts were committed behind closed doors by the inhabitants themselves and went unrecorded unless, chiming with the spirit of the times, they gave rise to an ennoblement of some sort for the perpetrator. There were more rich, influential villains per square yard here in this genteel quarter than in Westminster, the admiral always reckoned.

He frowned to see one of these approaching. A gent in evening dress, opera cape about his shoulders, top hat at a louche angle over his forehead, was weaving his way uncertainly along the pavement.

‘I say, Cassie.’ He drew his wife’s attention to the staggering figure. ‘Who’s this? Do we know him? He looks familiar.’

‘He is familiar! Look away at once, Oliver!’ Cassandra put up a hand, seized his chin and turned his head from the window. ‘I forget you scarcely know your own neighbours. But that’s ghastly old Chepstow. Drunk as a lord again!’

‘If that’s Chepstow he is a lord,’ objected Dedham, trying to turn for a better view. ‘He’s entitled, you might say.’

‘It’s no joke, Oliver! Stay still and give him time to move off. He’ll recognize you. And you’re the one man in London everyone — drunk or sober — wants to talk to and shake hands with. You really have no idea, have you? You’re twice a hero now, you know. He’d expect to be invited in for a nightcap. Darling, you’ve been away from me for six months! I’ve no intention of sharing you with any old toper.’ She pulled his head down into an enthusiastic kiss. ‘Ah … there he goes … Now, Oliver — the cabby’s waiting. Get on with the briefing.’