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Not really. “Yes, of course.”

“Now you just bang through each message as fast as you can.” Indicating the big spools of tape attached to the Typex. “Type in the encrypted stuff, and it’ll feed out in plain-text letters. If it looks like German, pass it on. If it looks like rubbish, put it aside and one of the more experienced girls will take a second crack at it.”

“I don’t speak German—”

“You don’t have to. Just recognize it. The tricky part is looking past the five-letter clumps everything is sorted into, but you’ll get the knack.”

Mab stared at the stack. “We’ll never get through all of this.”

“Up to a thousand messages a day in Red since France was overrun,” the girl said, which made Mab feel no more confident. Slowly she picked up the first message. Blocks of letters: ACDOU LMNRS TDOPS—on like that for a whole page. Mab looked at her partner, hunched over her own identical sheet of nonsensical five-letter groups, and wondered what Lucy was doing, back home. I shouldn’t have left you for this, Luce. You’re alone with Mum in a city that’s going to get bombed any day, and I’m stuck in a hut typing ruddy nonsense.

But there wasn’t any use whining about it, so Mab squared her shoulders, typed a few letter groups that the other girl had said were the introduction and signatory, then began on the main message: ACDOU LMNRS TDOPS FCQPN YHXPZ . . . To her surprise, the letters came out different: KEINE BESON DEREN EREIG NISSE.

“Keine besonderen Ereignisse,” said the girl to Mab’s left. “You’ll see that one now and then. I know a bit of German by now—it means ‘no special developments.’”

Mab stared at the message. No special developments. So this message wasn’t too important, then . . . or maybe it was. Maybe it came from an area where developments were expected. Maybe that was critical news. She kept typing, and the machine kept spitting out five-letter clumps of German until the end. “What do we do with these when—”

“Write the final position of the wheels under the message setting, sign it, stick the original decrypt to it, and put it in that tray. Keep going through your stack—things will get slow later, but we’re in a rush now to get all the Red decoded.”

“What is Red? If I can ask.”

“Red’s the key for German air force communications.”

“Why Red?” Mab asked, fascinated.

A shrug. “It was the colored pencil the boffins were using when they were first figuring out how to crack it. We’ve also got Green, Blue, Yellow—all different keys for different traffic.”

“Who are the boffins?”

“The brainy boys who make the initial breaks. They work out the setting for each cipher—if they didn’t, we wouldn’t know how to set our machines to decode all the messages.” Patting the Typex’s three wheels. “The Jerries change the settings every day, so every night shift as midnight ticks over, the boffins start all over again, figuring out the new setting for every—single—key.”

“How?”

“Who knows? However they do it, we decode it and then it moves off to Hut 3 for translating and analysis.”

Mab supposed that was what the German-speaking girls like Osla did: take this mess of German in five-letter blocks and turn it into nice legible English reports. Air force communications, army communications, intercepted at distant listening stations (whatever those were—Mab imagined men in headphones listening in on German radio channels, jotting Morse madly), then whirled through the various Bletchley huts so university boys could crack them open, so typing-pool girls like Mab could decode them, so bilingual girls like Osla could translate them. Like a conveyor belt at a factory. We’re reading your post, Mab thought, picking up the next report. Take that, Herr Hitler.

She hammered another message out on the Typex, taped and processed it, reached for another. By noon she had the knack of scanning those five-letter clumps, seeing which were rubbish and which were German. Her back hurt from curling into a C, her fingers were sore from hammering the stiff keys, but she was smiling. Look at me, she thought. Mabel from Shoreditch, decoding ruddy Nazi intelligence. Mum would never have believed it, even if Mab had been able to tell her.

It was two more days before Mab got a look at the men her seatmate called the boffins.

“This box of pencils and supplies is for the boys in the next room. Miss Churt, take it over.” Mab obeyed, dying for a look at the other denizens of Hut 6.

Stalky, red-haired Giles Talbot answered her knock.

“Oh, it’s you! ‘Divinely tall goddess—’”

“Tennyson,” she said, pleased to recognize the quote.

He grinned up at her. “Don’t tell me you ended up in our ring of the Inferno, Miss Churt?”

“Decoding Room,” Mab answered, reflecting that it was strange to see Giles in trousers, not just white legs stuck all over with duckweed. “Do make it Mab, not Miss Churt.”

“If you’ll make it Giles, O faerie queene—”

“Spenser! And yes, I will.” Mab handed the box of supplies over, looking around. Another stuffy room crammed with men hunched over desks, every surface heaped with scraps of paper, pencil stubs, and jumbled strips of letters. The fog of concentration in the room was as thick as the fug of cigarette smoke as the men muttered and scribbled. They looked like they were at the absolute end of their tether, like they’d fallen off another planet. But Mab would eat her hat if these weren’t the brainy boys who cracked the keys . . . and she’d bet they were all Cambridge or Oxford boys, too. Her hopes rose. University degrees weren’t exactly thick on the ground in Shoreditch.

Of course, a good university didn’t mean a good man. Mab of all people knew that. She shoved that particular memory away before it could curdle her stomach into an icy ball, down, down, bloody go away—and smiled at the roomful of potential husbands. Just let one of you be nice as well as educated and gentlemanly, and I will make you the best bloody wife you ever dreamed of.

“What’s a girl to do for fun round here when shift’s over?” Mab asked Giles with a dazzling smile.

“There are more recreation clubs here than you can shake a stick at. Highland dancing, chess—”

“I’m not one for reels or game boards. Do you like books? Osla Kendall and I are starting a literary society—”

“Love a good yarn. I’m your man.”

Maybe you are, thought Mab, who had made up the literary society on the spot. Not the lure she’d have used for the lads back home, but in this crowd . . . “First meeting Sunday next. Bring the boys.” She aimed another smile round the room and went back to her Typex.

“I’m knackered,” Osla groaned when Sunday next finally arrived. “The work’s not hard, but every day it feels like the pace doubles.”

“My hut, too.” If it had been peacetime, the frenetic rate of the work would have given Mab thoughts of transferring elsewhere, but with a war on, all you could do was grit your teeth. She reached up to fluff her hair. “Forget the work for a night. It’s time for fun.” The Shoulder of Mutton inn was to host the first meeting of the Bletchley Park Literary Society—Giles said their fish and chips weren’t to be missed, and after Mrs. Finch’s leaden stews, fish and chips sounded like heaven.

“I nabbed a fellow for tonight’s meeting, by the way—just for you.” Osla too sounded like she was determinedly putting her very long week behind her, along with the war and everything else unpleasant. “He’s Hut 8, simply scrumptious. The tallest thing you’ve ever seen; positively made for a six-foot wife. You won’t be stuck in flats your entire life.”

“I don’t mind men who are shorter than me. I mind men who are touchy about being shorter than me.”

“What about Giles, then? He’s too much the jester to get in a wax about anything, much less tall women.”

“Something tells me he’s the bachelor type . . . we’ll see after tonight.” Mab grinned. “The nice thing about meeting men here is that they can’t drone about what they do. They actually have to talk about books or the weather—”

“Or, God forbid, ask you a question or two about yourself.” Osla grinned back, swinging her crocodile handbag. “Are you heading chez Finch first to change?”

“Yes, red print frock.”

“You’ll look slap-up. I don’t think I’ll bother changing, just nip straight there all scruffy and ink stained, and no one will look at me when you swan in.”

Osla could roll in a gutter and still everyone would look at her, Mab thought. Even at the end of a very long shift, she looked rumpled and adorable rather than frazzled and exhausted. It should have been easy to resent Osla, but Mab couldn’t quite manage it. How could you resent a girl who scouted men over six feet tall for another girl’s husband pool?

“There you are,” Mrs. Finch greeted Mab as she came into the scrubbed kitchen. “Working on a Sunday, I see.”