“I don’t know,” Polly said. “I fear they’ll only make things worse.”

“Hush,” Mrs. Brightford said. “And then the good fairy said, ‘The spell is already cast, and I cannot undo it, but I will do what I can.’ ” And Polly wanted to stay and listen to the end of the story, but she was late, she had to get to Dulwich before the twenty-ninth. She ran through tunnels and corridors and up stairs which were sometimes in Holborn and sometimes in Padgett’s, and she couldn’t run very fast because she was carrying the answer that she had puzzled out, clenched in her fist like a penny.

She didn’t dare let go of it. She had to hold it tight against her stomach till she had the string wrapped round it, till she had all the ends tucked in. She had been late getting to Dulwich and missed hearing the first V-1s, so she hadn’t known what they sounded like, so she had knocked Talbot into the gutter and wrenched her knee and had had to drive Stephen, and if she hadn’t, he and Talbot would have been killed in Tottenham Court Road, and he wouldn’t have come up with the idea of tipping the V-1s …

But it wasn’t a V-1, it was a siren, and Polly had to go out onstage and bend over and flip up her skirt, but her knickers didn’t say, “Air Raid in Progress,” they said “Wrong Way Round,” and when she tried to look over her shoulder to read the message, a V-1 came over, rattling like a motorcycle, and she had to run downstairs to the shelter in Padgett’s basement, holding the answer tight in her hand, the answer that made it all make sense—Eileen’s driving lessons and Stephen and the Wren and Alf and Binnie’s parrot and the library at Holborn.

But she wasn’t in Holborn, she was in St. Paul’s, trying to find a way up to the roofs. But she couldn’t. It was too dark. She needed a torch.

Mike had it, he was swinging it back and forth, trying to see what was fouling the propeller. “Shine it over here,” she said, but Mike said, “I can’t. There’s no time. The U-boats will be here any minute.” And when she looked up at the boat looming above them, she saw it wasn’t the Lady Jane, it was the City of Benares.

“Get the lantern!” Mike shouted.

“What lantern?”

“In the painting,” he said, and she ran back down the curving staircase, past the masks of Comedy and Tragedy, her hands cupped protectively around the answer, through the north transept and under the dome to the south aisle …

And full tilt into Alf and Binnie, colliding with them, her hands reaching out instinctively to break her fall, opening, spilling all of it—the slippage and Agatha Christie and the Lady Jane and the air-raid warden and her bloomers—like pennies, like Crimson Caress lipstick onto the pavement and into the road. “Oh, no,” she said, bending to pick it up. “Oh, no.”