The apartment in Alfama had a guest no one had invited.
It arrived in October, when the rain began. Not a person — a presence. A weight in the second bedroom. A temperature — 22°C, constant, regardless of heating or season. The kind of warmth a body leaves in a chair.
The tenant, a young cellist from Porto, noticed it the way you notice a draft: gradually, then all at once. She woke at 3 a.m. The second bedroom's door was open. She had closed it.
She closed it again. It opened.
She wedged a chair against it. In the morning, the chair was inside the second bedroom, placed neatly by the window, facing the street, as if someone had been sitting in it, watching the Alfama trams pass in the dark.
The cellist called her mother. Her mother said: "Does it want anything?"
"I don't know."
"Then it's not a ghost. Ghosts want. If it just sits, it's a tenant. Charge it rent."
The cellist did not charge it rent. She left the door open. She played cello in the evenings — Bach's first suite, the prelude, the one that sounds like a man walking through a house he built and is about to leave. The vibration entered the floorboards. She could feel it in her bare feet, and she could feel, from the second bedroom, something leaning into the sound. The presence listened — she could feel the quality of attention shift when she played, the way a room changes when someone in it is truly hearing.
One night, she found a note on the chair. Not written — pressed into the fabric, as if by the weight of sitting. Letters formed from pressure, not ink:
THANK YOU. THE MUSIC REACHES WHERE I CANNOT.
She pressed her palm flat against the letters. They were warm. She played more often after that. The presence stayed. It never moved beyond the second bedroom. It never spoke again. It maintained its 22 degrees. It kept the chair facing the window.
When the cellist moved out, two years later, she told the landlord about the guest.
"I know," the landlord said. "It's been there since 1974. It tips well."
She did not ask what currency.