The logbook was a condition of employment. British Waterways required a record kept at every manned lock: water levels morning and evening, vessels passed through with cargo and direction, coal drawn against the keeper’s allowance, defects observed in the gates and paddles. The book at Marle Bottom Lock was a tall green ledger, and when Iris Calloway took the night post in the autumn of 1959, eleven of its pages were already filled in a hand so upright and evenly spaced it might have been printed.
6.15 a.m. Upper pound 4ft 1in. Lower 3ft 9in. Two pairs through, southbound, coal. Grease applied, gate two. A. Meacham.
Arthur Meacham kept the day shift. He lived two miles up the towpath in the direction Iris never walked, and their hours touched only on paper: he signed off at six in the evening, she signed on at six, and the lock’s one lamp changed hands by way of a hook on the cottage door. In her first month she saw him once, from a distance, a broad-backed man in a donkey jacket stooping over the beam like a man closing a very large book. She did not wave. It seemed possible he had not seen her, and she was young enough then to find it easier to be unseen.
Her own first entries imitated his. Levels, boats, coal. But the night traffic was thin — the freight pairs mostly moored by dark — and a lock at night is a long time to stand beside, so on the fourth week, beneath the required figures, she wrote: Heron on the top gate again, 2 a.m. Stood like a hinge. Did not pay the toll.
The next evening, under his own figures, in that upright hand: The heron has been defrauding this company since 1947.
That was the beginning. It would be wrong to say the entries became letters, because neither of them ever once wrote the other’s name, and the figures always came first — levels, boats, coal, in his hand and then in hers, the ledger keeping its double spine of numbers down the years like a pulse. But beneath the numbers the margins began to fill. He told her the third paddle wanted a firm foot in frost, that the milkman could be trusted with messages but not with change, that the previous night keeper had lasted five weeks and had been afraid of the dark, which is a poor quality in night staff. She told him the fox crossed the tail bridge at ten past three with the regularity of a branch-line service, that the boaters’ children called the lock “Marley’s Bottom” and could not be corrected, that Orion stood in the lower pound on clear nights, upside down and rippling, the only cargo that passes through without papers.
He corrected her spelling twice, early. She began misspelling on purpose, once a month or so, the way you leave a gate unlatched for a cat. He never failed to take it, and never once acknowledged the game, and this — she decided — was the purest form of conversation she had ever conducted with anyone.
They ran the lock like that for nine years. It should be said plainly: they were never in love. What they were was harder to name and lasted longer. She learned him the way you learn a house in the dark, by the placement of things. He was a man who reported his own errors in full — gate two left unchained Tues., my doing, no harm come of it — which she understood, after a while, to be a kind of courage, the unglamorous kind that keeps ledgers honest. He learned, presumably, whatever the margins gave him of her, and asked for nothing more, and in nine years never once suggested they alter their shifts to meet.
Only twice did the numbers themselves carry news. In February of 1963, the winter the canal froze to the clay and the ice held boats like flies in amber, his morning entry read: No movement. Pound frozen. M. taken to hospital Wednesday. Below the figures, nothing. Iris did not write a condolence; a condolence would have been a trespass on ground they had never claimed. Instead she came in three hours before her shift for the length of that winter and did his heavy greasing in the dark, so that each morning he found the beams already dressed, and neither of them ever wrote a word about it. The entry for the morning of March the ninth read: Upper pound 4ft 2in. Lower 3ft 10in. Thaw begun. M. buried Monday. The gates were easy this winter and I know why. A.M.
That and I know why was, in nine years, the closest either of them came.
The second time was the end. The freight had been dying under them all along — the entries recorded it without comment, four pairs a day, then two, then the long summer of 1967 when a week could pass and the figures said only no movement over and over like a pulse growing thready. The letter, when it came, was addressed to the lock and not to either keeper, and Arthur copied its substance into the ledger as though it were weather: Navigation to be closed to commercial traffic from 31st December. Posts to be discontinued.
They had a month of entries left. She thought, that first night, that the margins would grow full — that everything unspent between them would want out before the book closed. The opposite happened. The entries grew formal again, levels and weather and small repairs, as if by unspoken agreement they were tidying the house before handing back the keys. She understood. The margins had never been for saying things; they had been for keeping things, and there was nothing left to keep that the book did not already hold.
On the last morning — she had asked, in the margin, if she might take the final shift, and he had replied only the night post has always suited this lock — Arthur made his entry at six in the evening and signed it, and beneath his signature, for the first and only time, he broke his own form:
Nine years of figures in this book are half mine and half another hand’s, and any inspector will find them continuous. That is the whole of lock-keeping and I was glad of the company. A.M.
Iris kept the lock through its last dark. No boats came; the upper pound stood at four feet one inch and had no further instructions. At ten past three the fox crossed the tail bridge, punctual to the end of the timetable. At six she wrote the levels, and the coal, which was none, and one heron, account still outstanding, and signed her name in full for the first time — Iris Calloway — because there would be no one after her to know it, and then she closed the green cover and hung the lamp on its hook for a man who would not come to take it.
She was told, years later, that the ledgers from the closed navigations had gone to a museum of inland waterways, and once, in her sixties, she went. The book was there, in a case, opened under glass to a page from 1961 — levels, boats, coal, his hand and hers alternating down the page, not a margin note on it. The card beneath said: Lock ledger, showing the daily record kept by staff. She stood a long while and found she did not mind. Any inspector would find them continuous. The friendship was not in the margins after all; it was in the figures, in the level held steady across ten thousand handovers between two people who never met — the water passing from his hands to hers each evening without ever once being dropped.