The two gunmen raced to the taxi, firing backwards over their shoulders at Peterson who chased after them armed with nothing but fury and his bare hands. They bundled themselves into the back seat next to the shrieking woman in the feathered hat. Unsurprisingly, she rapidly made space for them and their guns on the back seat.

Hit in the shoulder and leg and bleeding on to the pavement, the butler raised his head and watched as the motor erupted into a three-point turn. In his agitation, the driver seemed to clash his gears and the car ground to a juddering halt, its rear licence plate clearly in view in the light of the lamp. Peterson focused, stared and repeated the number to himself.

In the distance a police whistle sounded and the boots of the beat bobby pounded along the pavement. Peterson called out faintly.

At last, the taxi screeched off with a great deal of revving but little forward momentum.

The turbulence in the back seat threw up a stink of sweat, the iron odour of blood and a reek of cordite. This noxious cocktail was accompanied by a gabbling argument in a language the driver could not understand. But rage soon expressed itself in plain English. ‘Stop farting about, you bastard! Drive!’ the larger of the two men snarled. ‘To Paddington station. Fast. Miss one more gear and you get it in the neck yourself. Like this.’ He pulled back his gun to point it ahead through the open window at the beat bobby who had placed himself squarely in the road in front of the taxi, one hand holding a whistle to his mouth, the other raised in the traffic-stopping gesture. This calm Colossus held his position as the taxi came on, impregnable in his authority.

Two shots sent the imposing figure crashing on to the road.

The cabby swerved violently and deftly mounted the pavement to avoid running over the body.

‘Leave it to me, sir,’ he said, apparently unperturbed by the hot gun-barrel now boring into his flesh. ‘I know these streets like the back of my hand. We’ll go the quickest way.’ And, light but reassuring: ‘Don’t you worry, sir — I’ll get you to the station all right.’

Chapter Five

Joe looked up from his notes and ran a hand over his bristly chin. He blinked and focused wearily on his secretary across the desk. ‘Who did you say, Jameson? Constable Wentworth? Oh, Lord! My nine o’clock interview. Didn’t I say she was to be intercepted and her appointment deferred?’