The Phantom Sum

Two hinges. One in, one out. Wren marks which is which and she goes home. That is the whole of the job, and it is the whole of her, most nights. Tonight the flood-year folio will not let her go home. The ledger-house on Saddleback Row keeps one lamp against the dark and one chain against theft, and the great volume sits under both, spine up, folios stitched thick as a hand. Wren draws her finger down the left page — Per, the debits, the departures — and down the right — A, the credits, the arrivals — and she casts the column the slow way, because it is the only way: twelve pence to the shilling, twenty shillings to the pound, the Roman sums squinting back at her like old men who won't repeat themselves. She does not tell anyone she reads the oldest numerals slowly. She does not tell anyone she has cast this same column four times since the frost. The debits total. The credits total. And between them sits a difference that should not exist: iij s. iiij d. Three and fourpence. The same three and fourpence she found last month, and the month before, and the month before that. Not a growing error, not a shrinking one. A fixed thing. A phantom that arrives at the foot of the page every time she counts, like a lodger who pays no rent and cannot be evicted. An honest mistake wanders. Hers sits still. She strikes nothing. That is the first law Master Corvin ever gave her — *a clean page, girl, is a lie; show me the strike-throughs and I'll show you an honest hand.* So she leaves the false-looking total standing and writes, small, in the margin: *cast up iiij times, difference iij s. iiij d., cause unknown.* Her own hand shakes on the *unknown*. If the fault is hers, the district is unbalanced, and an unbalanced ledger does not stay quiet forever. The folio is dated the flood-year. It carries Master Corvin's signature at the closing, the ink gone the colour of weak tea. And somewhere on its facing pages is an account she has never had the nerve to read closely, because the departure posted there — a gate-keeper, crossed out through the crypt door the winter the water came — is her mother's. She closes the book before she can look. That is when she hears the sill. Not the door. The sill. The particular scrape of a boot dragged over a raised oak saddle — the sound of someone stepping *over*, deliberate, the way the district teaches you to cross so the water and the mud and the other things stay out. Wren knows every door on the Row and the hour each one is bolted. None of them opens at this hour onto this room. She turns. Down the passage, past the reach of the lamp, a door stands open that she has never once, in three winters of filing blanks in this house, seen hung there. Strap hinges, long leaves dropped over their pintles, one leaf catching the light and one lost in the dark — and she cannot tell, she *cannot tell by sight*, which hinge lets you leave and which lets you arrive somewhere the street should never reach. Because it is in no folio. Because she has never recorded it. Because it has no fixed arriving-hinge at all. Through it, cold air that does not smell like the Row. It smells of a wider place, lamps she doesn't own, streets laid out by some other hand. Wren counts, because her hands need something. One door. Two hinges. Zero entries. A debt with no matching credit, hanging open into the dark. "Three and fourpence," says a voice from the far side of the sill — a woman's, unhurried, precise, as though finishing a sentence Wren began years ago. "You've cast the column four times, and it still won't square." Wren's throat goes tight. She has told no one the sum. She has written it only tonight, only just now, in a book chained to a house locked from the inside. "Who's there," she says. Flat. Not a question she wants answered. A shape resolves at the edge of the light — a tall woman, elegant, patient, a warded key hanging at her collar that fits no lock Wren has ever cataloged. She does not step over the sill. She waits on her own side of it, the way something waits when it knows you'll be the one to cross. "Shall I tell you the entry you're missing, Wren?" she says. She uses the name easily. Fondly, almost. And Wren, who has never given it, feels the whole balanced house tilt three shillings and fourpence toward the dark.