What We Do Not Measure

Rowan Ferreira arrived at the laboratory in October with two suitcases, a contract for three years and the tacit assumption, common at his age, that everything worth knowing about a building could be learned from its documentation.

Magda Vrba had been the technician there for thirty-one years. She did the ordering, the calibration and the inventory, she knew which supplier answered the phone in August, and she carried in her coat pocket a green notebook that was not part of any official record.

He saw her writing in it on his third day and asked, politely, what it was for. "Things nobody logs," she said, and put it away. He decided it was a habit of long service, harmless and slightly comic, and he did not think about it again for a month.

In November a machine on the far bench began to behave badly. Rowan spent two days on it, wrote to the manufacturer and drafted a note for the group, in which he used the phrase intermittent and unexplained twice. Magda read the note over his shoulder and asked whether he had checked the door.

The door in question was the one to the corridor, which had been catching in cold weather since the winter of 2014 and which the cleaning staff therefore propped open with a bin between five and six in the morning. She showed him the entry. Three lines, a date, no conclusion drawn.

Rowan was sceptical, and said so in a way he later recognised as condescending. The notebook was anecdotal. It had no method, no controls and no dates that were regular enough to be worth anything. Magda agreed with all of this without appearing to feel that it settled the matter.

What it had instead was thirty-one years of peripheral fact. Which freezer's seal you have to lean on. Which of the two lifts is used for deliveries and therefore stands open. How long the old centrifuge takes to slow down, and how much longer it took last spring than the spring before.

None of this was knowledge in the sense Rowan had been trained to respect. It was closer to what a farmer knows about a field: unwritten, unowned and useless to anybody who has not stood in the same place for a very long time.

He began, without announcing it, to be more attentive. He noticed that Magda arrived at ten to eight and that the students arrived when they arrived; that the tally of gloves on the store cupboard door was hers; that the annotation in the margin of the equipment log, in pencil, was hers as well.

In February the notebook saved him a fortnight. A batch of results that made no sense turned out, on her prompting, to have been produced in the week when the building's heating had been off for repairs, an event recorded nowhere except on page one hundred and four in pencil.

He asked her, some time later, why she had never made a proper record of it. She said she had, twice, in the nineties, and that both times the file had been thanked for and filed away. A green notebook in a coat pocket, she pointed out, does not need anybody's approval to survive.

Magda's handover is next summer. There is no successor named, because the post has been advertised twice at a grade that attracts people who leave within a year, and because nobody in the building has yet worked out that the post and the notebook are not the same thing.

Rowan has bought a notebook of his own. It is unremarkable, has an elastic band round it, and contains nine pages of things that would embarrass him if a committee read them out: the sticking door, the lift, the three days in March when the water in the taps runs warm.

He has not decided what he thinks the notebook is. He knows that it is not evidence and does not want it to become a system. What he has come round to is smaller than that: a place has properties, and the ones nobody measures are the ones that leave with the person who noticed them.