Costa didn't stay long that night. In the little sitting room off the front hall, he drank one small coffee and admired the tiles. He mentioned the roof twice and the deadline once, and his handshake at the door was as soft as a damp cloth. Still, he left Carol certain of one thing. Whatever was in this house, he wanted it badly, and he was running out of time to want it quietly.
So was Carol. She had only two days left.
In the morning she found Rosa in the kitchen. The small office downstairs had given her the brown notebook, but it hadn't told her enough. Lobo had refused to say what he and her aunt had been working on. She no longer knew who to trust. The only place left to look was the room behind the green door upstairs. She asked Rosa directly. "I need to get into that room. Is there another key anywhere, perhaps a spare that someone kept?"
Rosa didn't even pause in her work. "There is no other key," she said. "The key is on the floor, inside the room, where I cannot reach it and neither can you. I wish there were another one, Carolina."
Carol believed her. That was the strange thing. After everything, she believed Rosa completely, which only deepened the mystery instead of solving it.
She went up to the top floor alone and stood in front of the worn green door, the wood rubbed bare around the handle. The door was locked from the inside, the key lay on the floor behind it, and her aunt had died in a hospital across the city. She'd turned this puzzle over in her mind a hundred times, and it still had no answer.
She got down on her knees, the way Rosa must have, and there it was: the key, lying on the floor just inside, visible through the thin gap under the door. Through the keyhole she could see only darkness, and the gap was far too narrow for anything to pass through. She stood up again, no closer to an answer.
Then she looked, really looked, at the rest of the hall. She saw what she'd walked past every day. At the very end of the short hallway, beside the office, there was a narrow window. She'd always taken it for part of the wall, since it was old, small, and painted over many times. But it was a real window.
She crossed to it and worked the latch. It was stiff with years of paint, and then it gave, all at once, and swung open onto the cool morning air. Beyond it wasn't a drop to the street. Beyond it was a narrow stone terrace, a meter wide, running along the rooftops between the leaning houses.
Carol looked down at the river, far below and bright, and she thought about her two grown daughters, and her knees, and her good sense. Then she put one leg over the sill, the way she hadn't climbed through anything since she was a little girl, and she stepped out onto the risky terrace.
The terrace was so narrow that Carol pressed her back against the wall and moved sideways, one slow step at a time. Below her, the rooftops of Lisbon spread out in waves of red and orange, and the river lay flat and shining beyond. Two steps along the stone, exactly as she had hoped, was her aunt's office window.
It was unlatched.
Carol pushed it up and tried to climb in, which ended up being more falling in than climbing. She stood in the middle of her aunt's locked world, and her heart was beating a mile a minute.
The room wasn't a mess. It was the opposite of a mess. It was organized the way only a careful mind organizes: maps rolled and labeled, letters in neat stacks, a long shelf of folders with small marks on their spines, every one of them in Portuguese. On the desk sat a wooden box the size of a loaf of bread, worn smooth on its lid by years of hands.
Carol opened it.
Inside were dozens of photographs. She lifted them out one by one, and her throat tightened.
There was her mother as a young woman, laughing on a porch Carol half remembered. There was Carol herself as a child, missing a front tooth and squinting into the Kentucky sun. There was Lottie at what must have been her own graduation in a cap and gown holding flowers. There were even Carol's own two daughters as teenagers, in a photograph Carol had never sent to anyone, and yet here it was, soft at the corners from being held.
For thirty years, behind closed doors, Lottie had watched Carol's whole family grow. She'd kept every picture, said nothing, and asked for nothing.
Under the box, when Carol lifted it, was a second notebook. It was thinner than the first, with a green cloth cover. She opened it, and the first page wasn't code, and it wasn't Portuguese. It was English, plain and clear, in her aunt's hand.
If you're reading this, you went through the window. Good girl. I knew you would. You were always good with puzzles.
Carol sat down on the floor of the locked room, in the dust and the morning light, and she read.
The green notebook told her three things, simple and straightforward, the way you tell a child something important so they'll remember it. Slowly, page by page, she began to piece together what it all meant.
The first thing was that for thirty years Lottie had been finding papers. They were old documents from the years when Portugal had been ruled by fear, the long gray years of the dictatorship that ended before Carol was grown. Powerful people had hidden them, or stolen them, or paid to make them disappear. Every powerful name in the city, it seemed, had a skeleton in the closet. Her work had started by accident. She had come across a bundle of old papers behind a loose board in the guesthouse. They were records from the dictatorship, with the names of people who had disappeared, the names of the men who had made them disappear, and the deeds to houses and land taken from families who were never paid. Tucked inside was a list of other houses and shops where the same men had hidden similar papers, so she knew there were more waiting to be found. She went on to find them in the basements of old houses, in the back rooms of closed offices, and in boxes that families sold when someone died. She kept going because the people those papers had hurt deserved the truth, and because nobody pays attention to a quiet woman who runs a guesthouse. She had protected the papers and passed them, slowly and carefully, into safe hands, where the truth couldn't be erased and where it could one day come to light. It wasn't dramatic work. It was patient work. It had filled most of her life in Lisbon, and it wasn't finished yet. The last and most dangerous papers were still hidden, the notebook said, in the walls of this house. Carol looked slowly around the room at the old plaster walls and wondered which one hid the papers, and whether she had enough time to find them.
The second thing was that the buyer didn't want the guesthouse. Lottie had learned in March that someone powerful was after the house, and she knew exactly what he wanted from it. He wanted what was inside the walls, so that he could destroy it before it could ever be read. If he got the house, he would get the papers. Families who had waited for decades to learn what happened to their missing relatives would never know, and the homes and land taken from them would stay with the men who stole them.
The third thing was shorter than the others. There's a man who has helped me keep this house and everything in it safe for thirty years. His name isn't important to write here. You've already met him. When you don't know what to do, do what he says. Trust him. The bird means safe.
Carol read that last line twice. The bird means safe. She thought of the little one-winged bird on the oldest page and on every page that mattered. It was her aunt's way of marking every person and place she had protected and trusted.
Something else came clear to her then, sitting on the floor of a room that should have been impossible to enter. Her aunt had locked this door from the inside, dropped the key on the floor, and left through the window. She had walked along the terrace, climbed in through the window in the hall, and latched it behind her. Nobody would ever think to look for a way out that no door could show. It wasn't a ghost and it wasn't a riddle. It was Lottie, tidy and careful to the very last, locking her life's work behind her and trusting the right person to find the window. Rosa had never known the trick. Carol knew it now.
She put everything back exactly as she'd found it, the photographs in the box, the green notebook under it, the lid worn smooth. Then she picked up the key from the floor, unlocked the green door from the inside, and stepped out into the hallway, brushing the dust off her knees.
Lobo was standing at the end of the hallway, watching her, his hands folded, his face unreadable.
"You went through the window," he said.
"She told me I would," said Carol. For the first time since Kentucky, she wasn't afraid of him at all.