mouth again, but witha snap, like an elastic band breaking, she abruptly disappeared. Her presence was still there, though, and the twins could feel her suspicion. They could also detect the faint smell of peppermint in the auditorium.
âLetâs go,â said Jenny.
âWait ââ
Something was happening on the screen. Dim shadows again played on its surface and then formed into the two running figures of May and Leslie. But this time there was light at the end of the tunnel.
âWhere are they heading?â muttered Jenny.
âThe old repair works?â Davidâs voice was hopeful. âMaybe they did hide out there.â
The patch of light grew larger and for a brief second the twins caught a glimpse of a wilderness of rusting metal and overgrown foliage. Then the screen went blank â and stayed that way.
âYou come to get that trolley again?â asked Nell, her voice penetrating the gloom and giving them a terrible shock.
âI think weâll have to leave it here,â said David. âI donât see the hospital being exactly keen on it.â
âSo you wonât have any more excuses for coming back then.â Nellâs voice had a slight edgeto it now. âI saw you both staring at the screen. Whatâs so special about it?â
âNothing,â said Jenny and David in chorus, wishing they didnât sound so guilty. They didnât want to confide in Nell. Sid might not like it.
âYou were watching something.â
âWeâre doing a school project on the homeless,â said David with sudden inspiration. âSid said we could study his â his â â
âEnvironment? Iâm not thick, you know. I could probably write it for you,â Nell cut in acidly.
âPerhaps we could interview you,â said Jenny in what she knew was a wheedling tone.
âNo chance.â
âWhy not?â asked David.
âBecause I donât believe you.â
âBut â â
âYouâre up to something. Up to something for Sid. I know him all too well. Broken-up old man, he is. He needs someone to take care of him. But instead of that heâs always on about his mission. Know anything about it?â
âEr, no,â said David.
âSure?â
âQuite sure.â Jenny was deeply uncomfortable.
âOh, well.â Nell shuffled towards a pile of boxes and sat down heavily with a sigh. âIâm going to have a kip, but if either of you kids wantsto confide in an old woman, Iâm ready and willing. It gets lonely down here, you know.â
David and Jenny looked at each other in consternation.
Chapter Five
Although they knew they were late for lunch, the twins walked home slowly, immersed in their own thoughts yet sharing most of them. They lived in a ramshackle old Victorian house overlooking what had once been a wharf. David and Jenny were happy there; it was a great improvement on the estate where they had lived before. They loved the Thames, which ran alongside the garden centre which their father managed. But today, although the rain had cleared, the river was swollen, lapping uncomfortably close to the shore, while the house seemed to have a sullen, tired look.
âIâm knackered,â said David as they walked up the front path. âIâm playing football this afternoon and I
should
be playing again tomorrow morning,â he added in martyred tones.
âWell, youâre not now,â Jenny snapped. âWeâve got to go and report back to Sid and then take a look at the Roxy again.â
âWeâve seen all we can, and itâs Sunday tomorrow. Donât we get a day off?â
âDonât be so daft.â Jenny was angry now.âHavenât you got
any
sense of responsibility?â
âAll right then.â David was honest at last. âIâm scared.â
âWhat of?â But she knew what he was going to say,