The Last Assignment

The first lesson of the course, eight years ago, had been: *observe before you conclude; count before you observe.* So Cass counted. The last real Sunday letter — the one before the silence — had arrived eleven days before his death, and she still had it. She read it as an object, not a memory, the way he'd taught her to read the case photographs: paper stock, postmark, rhythm, what the letter said, what it was for. It was different, and she saw it now. The final letters of the course had been moving somewhere for weeks. The assignments had shifted — from cold cases with names filed off to *live* drills: a newspaper piece from twelve years back that Marlowe had once called the only case that beat him; a city-directory exercise that had her tracing the movements of a man who had, the exercise revealed, changed his name twice; a final Sunday letter that contained, instead of an assignment, a set of instructions Cass had taken for course administration and now saw plain: *"If anything stops the Sunday letters, dear girl, do the last assignment. It is the only one that was ever real: the case that beat me is not unsolved. It is unfinished. The materials are in my office, and my key is where your envelopes come from. Whatever stopped my Sundays knew the case was close. Finish it for me."* *Your envelopes come from* — the letterpress shop. He had left his office key taped inside the envelope drawer at her counter, months ago, with no note, saying nothing — the way a man leaves a thing when he has begun to suspect the shape of his own ending and wants the key in the one hand he trusts before the interruption. She went that night, with the key, to the office above the defunct notary's — and the office told her everything, because offices do, if you've done your homework. It had been searched. Searched *well*, by someone orderly and thorough — but the search was a conclusion before an observation, and Cass counted what the searcher had not: the paper stock of Marlowe's files, undisturbed in the cabinet where the dead man's own system — chronological, obsessive, jig-tight — had a gap. Six files, the twelve-year-old case's files, missing; and one file, the one the searcher had clearly been after, left *behind* — the file the searcher had concluded was the target and had taken from it only the thin folder Marlowe had labeled, in his own hand, *THE UNFINISHED, IN PROGRESS, NOT READY FOR THE STUDENT.* Not ready for the student. He had been running the live case by letter, teaching her the moves as he made them. The searcher had taken the master file and missed the correspondence — and the correspondence was in a letterpress shop two doors down, pinned to a wall, because the dead man had hidden his case file, lesson by lesson, in the one place in the city no one would ever look: the assignments of a correspondence course. Cass stood in the office of the best teacher she ever had, with the last letter of the course in her coat, and did the arithmetic he'd been building her toward for eight years: Marlowe had spent twelve years on the case that beat him — and had *not* left it unsolved. He had worked it, quietly, retired, alone, by mail, training a successor as he went, because he had known for some time what the Sunday letters had been dancing around: the case had never gone cold because its subject had never gone away — an orderly man, a man who noticed nothing twice, a man inside the machine, close enough to have known the case existed and patient enough to wait twelve years for the one detective who could finish it to die. And Marlowe, beaten but not beaten, had spent his last eight years doing the only thing left to do: building the instrument that would outlast him. The course was never a course. It was a handoff — every Sunday letter a lesson *and* a piece of the case, filed in the safest archive in the city: a student's homework, in plain sight, eight years of it. The typed letter had asked her to return the case materials to the executor. "Yes," said Cass Alder, in the dark office, in her neat compositor's voice. "Yes, I bet it did." She went home, took the eight years of Sunday letters off the wall, and — with the printer's patience he had always praised as her best instrument — began the last assignment: reassembling the case of the unfinished twelve, one lesson at a time.