Lonnie’s mouth dropped open.

‘Sir! Sir! Sir!’ the boy screeched, saluting wildly with his deformed hand. Then the two of them took to their heels and fled around the corner and out of sight, leaving only their laughter to echo back.

Lonnie looked at Doris, dumbstruck.

‘I guess some of the kids in Crouch End aren’t too crazy about Americans,’ he said lamely.

She looked around nervously. The street now appeared deserted.

He slipped an arm around her. ‘Well, honey, looks like we hike.’

‘I’m not sure I want to. Those two kids might’ve gone to get their big brothers.’ She laughed to show it was a joke, but there was a shrill quality to the sound. The evening had taken on a surreal quality she didn’t much like. She wished they had stayed at the hotel.

‘Not much else we can do,’ he said. ‘The street’s not exactly overflowing with taxis, is it?’

‘Lonnie, why would the cabdriver leave us here like that? He seemed so nice.’ ‘Don’t have the slightest idea. But John gave me good directions. He lives in a street called Brass End, which is a very minor dead-end street, and he said it wasn’t in the Streetfinder.’ As he talked he was moving her away from the call box, from the restaurant that sold curries to take away, from the now-empty curb. They were walking up Crouch Hill Road again. ‘We take a right onto Hillfield Avenue, left halfway down, then our first right… or was it left? Anyway, onto Petrie Street. Second left is Brass End.’

‘And you remember all that?’

‘I’m a star witness,’ he said bravely, and she just had to laugh. Lonnie had a way of making things seem better.

There was a map of the Crouch End area on the wall of the police station lobby, one considerably more detailed than the one in the London Streetfinder.