The letter arrived on a Tuesday, which Elsa Vogt would later consider significant — Tuesdays had always been the day her husband had died, the day the telegram came, the day the world cracked at its seams and let in the cold. This letter bore no official seal, no army insignia, only a wax blot the color of dried blood pressed with a device she did not recognize: a compass rose with one arm broken. She stood in the doorway of her cramped Leopoldstadt apartment for a full minute before she stepped inside.

Inside, she set the letter on the table beside a cold cup of coffee and a draft transcript of the Schenker Archive's inventory — work she had taken home against regulations, because there was never enough daylight and the gas lamps at the archive left her eyes burning. She had been a senior archivist at the Imperial and Royal Archive before the war. Now she was a junior cataloguer on a conditional appointment, allowed in the building on the sufferance of Dr. Brenner, who had made clear that her reinstatement was provisional and contingent on her continued discretion. She sat. She opened the letter.

The handwriting was educated — broad, confident strokes, the German of someone schooled before the war, before the empire fell and the new governments began rewriting even the alphabet. There were only three lines: You catalogued the Hartmann collection in the spring of 1913. One item is missing. Come to the Café Central at six o'clock on Thursday if you wish to understand what that means for your continued employment. It was unsigned.

Elsa read it twice, then a third time. She folded it carefully along its original creases and tucked it beneath the false bottom of the writing box her mother had left her — the one place in the apartment she was certain had never been searched. Her coffee had gone cold an hour ago. She drank it anyway, standing at the window, watching a man in a grey overcoat pause at the corner below and then, after a moment too long, walk on.