“Just like in an Agatha Christie novel,” Eileen said, looking at the packet after the doctor’d gone. “That’s always how the victim’s murdered.”

“Who’s been murdered?” Alf asked eagerly.

“No one. Go do your lessons,” Eileen said, still examining the packet. “But I doubt whether there’s anything in this powder for a fever. Aspirin’s the only thing which will help.”

Nothing will help, Polly thought, but she offered to go to the chemist’s for the tablets. “I need to ring the theater and tell them I’m not coming in. I can do that while I’m at the chemist’s.”

“Oh, I forgot all about your rehearsal,” Eileen said. “You could still go. I can care for Mr. Dunworthy.”

“It’s too late. By the time I got there, the performance would be over. And someone’s got to go for the aspirin.”

And she needed to get away for a few moments, to think out how she was going to tell Eileen. She would not be upset on her own behalf, but Polly couldn’t bear the look Eileen would have on her face when she told her they weren’t getting out. And worse, that she wasn’t the only one with a deadline. That Mr. Dunworthy had one, too. Soon.

As soon as she reached the chemist’s, she rang up the Alhambra. “Your luck’s in,” Hattie said. “Canning Town got it last night, so Tabbitt hasn’t made it in either, but he’ll be here tomorrow, so you’d better be. And if I were you, I’d think of a different excuse in the meantime. He’ll never believe the one you just told me.” There was a pause. “Oh, I’ve got to go. I’m on. Victory number. Ta.”

But there won’t be any Victory numbers, Polly thought, feeling her way back to the house through the darkness of the blackout. And what will happen to Hattie when we lose the war? And to the other girls in the chorus?

You know what will happen to them, she thought.

But perhaps it wouldn’t come to that. Mr. Dunworthy had said he didn’t know if the continuum was collapsing or correcting itself. And there were things in his theory which didn’t fit. If their actions had been a threat, why had they been allowed to come through at all? Why hadn’t they been prevented from coming in the first place, like Gerald?

And once they were here, why hadn’t they been allowed to leave? Mr. Dunworthy had said it was to contain the infection, but if Polly’s drop had opened, she wouldn’t have stumbled, shell-shocked and stricken, into Townsend Brothers, and Marjorie wouldn’t have ended up in Jermyn Street, wouldn’t have become a nurse, and if the people on the beach watching the smoke from Dunkirk hadn’t prevented Mike from going to his drop, he wouldn’t have fallen asleep on the Lady Jane and ended up in Dunkirk and saved Hardy’s life. And if Eileen’s drop had opened, she wouldn’t have been able to keep the City of Benares letter from Mrs. Hodbin; she wouldn’t have been there to drive the ambulance on the twenty-ninth and save her passengers’ lives.