They were making comparisons with Soham, although nobody had been tactless enough to point out that both girls in that case had been dead even before the parents had dialled 999. Time was said to be running out, and the police and volunteers were conducting intensive search operations in the surrounding countryside. There was speculation as to whether the families would make a media appeal that evening or whether they would wait until the next day. Because this was the one area they knew anything about, they got a whole ten minutes out of discussing the family’s media strategy before being interrupted with the news that their journalist on the spot had actually managed to interview a local. This proved to be a woman with an old-fashioned BBC accent who said naturally everyone was very shocked and that you don’t expect that sort of thing to happen in a place like Rushpool.

The news cycle reset at the top of the hour and I learnt that the tiny village of Rushpool in sleepy rural Herefordshire was the centre of a massive police search operation for two eleven-year-old girls, best friends, Nicole Lacey and Hannah Marstowe, who had been missing for over forty-eight hours. Neighbours were said to be shocked and time was running out.

I turned the radio off.

Nightingale had suggested getting off at Oxford Services and going via Chipping Norton and Worcester, but I had the satnav switched to fastest route and that meant hooking round via Bromsgrove on the M42 and M5 and only bailing at Droitwich. Suddenly I was driving on a series of narrow A-roads that twisted through valleys and over grey-stone humpbacked bridges before expiring west of the River Teme. From then on it was even twistier B-roads through a country so photogenically rural that I half expected to meet Bilbo Baggins around the next corner – providing he’d taken to driving a Nissan Micra.

A lot of the roads had hedgerows taller than I was and thick enough to occasionally brush the side of the car. You could probably pass within half a metre of a missing child and never know she was there – especially if she were lying still and quiet.

My satnav led me gently as a lamb through a switchback turn up onto a wooded ridge and then up a steep climb called Kill Horse Lane. At the top of the hill it guided me off the tarmac and onto an unpaved lane that took me further up while taking dainty little bites out of the underside of my car. I turned around a bend to find that the lane ran past a cottage and, beyond that, a round tower – three storeys high with an oval dome roof that gave it a weirdly baroque profile. The satnav informed me that I’d arrived at my destination, so I stopped the car and got out for a look.