‘I did not know that,’ said Cecilia, although she might have known it.

So long Titanic, hello Berlin Wall, she thought.

She would have preferred it if Esther had shared something with her about how she was feeling at the moment, any worries she had about school, her friends, questions about sex, but no, she wanted to talk about the Berlin Wall.

Ever since Esther was three years old, she’d been developing these interests, or more accurately, obsessions. First it was dinosaurs. Sure, lots of kids are interested in dinosaurs, but Esther’s interest was, well, exhausting, to be frank, and a little peculiar. Nothing else interested the child. She drew dinosaurs, she played with dinosaurs, she dressed up as a dinosaur. ‘I’m not Esther,’ she’d say. ‘I’m T-Rex.’ Every bedtime story had to be about dinosaurs. Every conversation had to be related somehow to dinosaurs. It was lucky that John-Paul was interested, because Cecilia was bored after about five minutes. (They were extinct! They had nothing to say!) John-Paul took Esther on special trips to the museum. He brought home books for her. He sat with her for hours while they talked about herbivores and carnivores.

Since then Esther’s ‘interests’ had ranged from roller-coasters to cane toads. Most recently it had been the Titanic. Now she was ten she was old enough to do her own research at the library and online, and Cecilia was amazed at the information she gathered. What ten year old lay in bed reading historical books that were so big and chunky she could barely hold them up?

‘Encourage it!’ her schoolteachers said, but sometimes Cecilia worried. It seemed to her that Esther was possibly a touch autistic, or at least sitting somewhere on the autism spectrum. Cecilia’s mother had laughed when she’d mentioned her concern. ‘But Esther is exactly like you were!’ she said. (This was not true. Keeping your Barbie doll collection in perfect order hardly compared.)

‘I actually have a piece of the Berlin Wall,’ Cecilia had said that morning to Esther, suddenly remembering this fact, and it had been gratifying to see Esther’s eyes light up with interest. ‘I was there in Germany, after the Wall came down.’

‘Can I see it?’ asked Esther.

‘You can have it, darling.’

Jewellery and clothes for Isabel and Polly. A piece of the Berlin Wall for Esther.

Cecilia, twenty years old at the time, had been on a six-week holiday travelling through Europe with her friend Sarah Sacks in 1990, just a few months after the announcement that the Wall was coming down. (Sarah’s famous indecisiveness paired with Cecilia’s famous decisiveness made them the perfect travelling companions. No conflict whatsoever.)

When they got to Berlin, they found tourists lined along the Wall, trying to chip off pieces as souvenirs, using keys, rocks, anything they could find. The Wall was like the giant carcass of a dragon that had once terrorised the city, and the tourists were crows pecking away at its remains.

Without any tools it was almost impossible to chip off a proper piece, so Cecilia and Sarah decided (well, Cecilia decided) to buy their pieces from the enterprising locals who had set out rugs and were selling off a variety of offerings. Capitalism really had triumphed. You could buy anything from grey-coloured chips the size of marbles to giant boulder-sized chunks complete with spray-painted graffiti.

Cecilia couldn’t remember how much she’d paid for the tiny grey stone that looked like it could have come from anyone’s front garden. ‘It probably did,’ said Sarah as they caught the train out of Berlin that night, and they’d laughed at their own gullibility, but at least they’d felt like they were a part of history. Cecilia had put her chip in a paper bag and written MY PIECE OF THE BERLIN WALL on the front, and when she got back to Australia she’d thrown it in a box with all the other souvenirs she’d collected: drink coasters, train tickets, menus, foreign coins, hotel keys.

Cecilia wished now she’d concentrated more on the Wall, taken more photos, collected more anecdotes she could have shared with Esther. Actually, what she remembered most about that trip to Berlin was kissing a handsome brown-haired German boy in a nightclub. He kept taking ice cubes from his drink and running them across her collarbone, which at the time had seemed incredibly erotic, but now seemed unhygienic and sticky.

If only she’d been the sort of curious, politically aware girl who struck up conversations with the locals about what it was like living in the shadow of the Wall. Instead, all she had to share with her daughter were stories about kissing and ice cubes. Of course, Isabel and Polly would love to hear about the kissing and ice cubes. Or Polly would, maybe Isabel had reached the age where the thought of her mother kissing anybody would be appalling.

Cecilia put Find piece of Berlin Wall for E on her list of things to do that day (there were twenty-five items – she used an iPhone app to list them), and at about two pm, she went into the attic to find it.

Attic was probably too generous a word for the storage area in their roof space. You reached it by pulling down a ladder from a trapdoor in the ceiling.

Once she was up there, she had to keep her knees bent so as not to bang her head. John-Paul point-blank refused to go up there. He suffered from severe claustrophobia and walked six flights of stairs every day to his office so he could avoid taking the lift. The poor man had regular nightmares about being trapped in a room where the walls were contracting. ‘The walls!’ he’d shout, just before he woke up, sweaty and wild-eyed. ‘Do you think you were locked in a cupboard as a child?’ Cecilia had asked him once (she wouldn’t have put it past his mother), but he’d said he was pretty sure he hadn’t. ‘Actually, John-Paul never had nightmares when he was a little boy,’ his mother had told Cecilia when she’d asked. ‘He was a beautiful sleeper. Perhaps you give him too much rich food late at night?’ Cecilia had got used to the nightmares now.

The attic was small and crammed, but tidy and well organised, of course. Over recent years, ‘organised’ seemed to have become her most defining characteristic. It was like she was a minor celebrity with this one claim to fame. It was funny how once it became a thing her family and friends commented on and teased her about, then it seemed to perpetuate itself, so that her life was now extraordinarily well organised, as if motherhood was a sport and she was a top athlete. It was like she was thinking, How far can I go with this? How much more can I fit in my life without losing control?