Category Sigma

#On the Designation

The letter Sigma appears twice in the file on the Anatolian Pitlands. Both entries are correct, which is rarer in that file than the reader might suppose. The first applies to the ground: the Pitlands are recorded as a Category Sigma contamination field. The second applies to what comes out of the ground. In the Bureau of Purity's own phrase, Anatolian crude is Category Sigma precursor matter. That label holds before anyone has boiled the sludge, cut it, sold it or put a match to it. So the letter belongs to a place and also to the substance taken from that place, and it travels with the sludge out of the seam on the back of a mule.

What the designation means is disputed. What it does is plain enough. Material classed Sigma is handled as contamination and not as goods. It can be sampled without the owner's leave, seized on the strength of a strip of reactive paper, and entered in a ledger under hazard rather than property. A cask of goods has an owner. A cask of contamination has only a finder.

The archive will not tell me who first set the letter in ink, or in which year. I have asked. The clerk who answered me did so by closing a drawer.

#On the Material Classified

The sludge leaves Anatolia stinking of tar, salt and the over-sweet rot that pit crews stop noticing in their second season. In the warren stills of Bastion-Constantinople, the Black Diesel Distillers cut it into whatever the districts will pay for. They make lamp cuts for shuttered rooms, thick sludge for cheap stoves, pulses for the pipe-feed, and a hot run for engines whose manifests swear they have never tasted it. All of these are black diesel. Purity decides case by case whether each cut still carries its mother's letter, which is to say it decides whenever a decision would be useful.

The fuel burns hotter than the Bureau ration, and it chokes. Fume-sickness, burns, chemical blindness, and the batch that runs too hot and takes the still-room and its master with it are all injuries a competent surgeon could name and a competent widow could bury. The trouble lies in what else is reported. Black diesel lamps are said to hum when lit. Chimneys stain with oily marks that some people read as script. The Distillers keep a rule, if smoke writes, shut down, and they keep it more faithfully than they keep most of the Creed.

Compare the Chrismole Furnaces of Brast. There, sanctified distillate moves under tallow-wax seals, rail manifests and calibration verdicts, and no drum leaves the city without its serial. Brast's fuel is permitted. Brast does not permit anyone to ask whether it is also cleaner.

#On Proof and Seizure

The Purity Fume-Inspector arrives at a kitchen door in a nose-mask with stitched filters and sleeves cuffed in ash. The kit is a ledger-lantern, a censer-kit, a stick of wax and a rack of ash vials. The sequence never changes. A scent survey comes first, to find the wrong smoke. Then the reactive test: a strip of fume paper is held in the draught, an ash vial is filled and stoppered, and the colour of the paper is announced to a witness. Purity's own field practice advises bringing a witness one can control. I commend its candour.

The selection follows. The manuals call this step narrative. The street calls it luck. Every house on a chimney row may be burning the same Anatolian cut, but only one is chosen. Its canister is seized, its occupants are named in a fume affidavit, and the warrant goes to the Bureau of Records to be entered.

This is where the designation earns its wax. Before the affidavit, the fuel in that kitchen did not exist, as the Bureau had stated in writing many times. After the affidavit, it exists completely. It has been weighed, sealed, classed Sigma and admitted as evidence. The canister has passed from denial into the record without moving an inch from the stove. The Bureau's resolution on contraband says so clearly enough to be embroidered on a stole: contraband does not exist unless confiscated.

The other houses on the row are entered as air cleared. In a sense they are. Their air has been cleared of inspection.

#On the Constantinople Precedent

In A.S. 136, a furnace quarter of Constantinople burned black diesel distilled from Anatolian crude, and the smoke began to form letters. The Pitlands file traces that crude to a seam the smugglers called Saint No-Name's Throat. On the crude and on the letters, every account agrees. On almost everything else they part company. Witnesses described words in the cloudline, but which words they were, and in what tongue, depends on which witness one reads and which office took the statement. Soldiers were sent in. By the older accounts, some of them fired into the vapour. Firing into the vapour did not help.

Each office took its own lesson from the smoke. Doctrine held that the fuel corrupts, and that nothing more needs saying. The Distillers held that fuel remembers pressure, song and death, and that a quarter full of furnaces has supplied all three. Engineering denied this with the face of a man listening to his own boiler. Purity built a profession on it. Ever since, smoke has been treated as air-borne evidence, and an inspector is entitled to call a chimney as a witness.

I do not claim the letter Sigma was coined in that smoke. Nobody has shown me that it was. I note only that no officer of Purity since A.S. 136 has needed it explained why Anatolian crude should carry a category.

#On Enforcement and Dependence

Standing Order 14-K threatens immurement for every stage of the trade: extraction, transport, distillation, sale, possession, ignition and interpretation. Category Sigma tells the inspector what he is holding. The Standing Order tells him what may be done to the person who held it before him. The two are meant to be read together, and very often they are.

The Bureau ration does not keep a district warm through the winter. Beneath the Warrens, the Hidden Pipe-Runners carry Sigma-classed fuel through ducts the city's surveyors have never drawn. It feeds lamps in rooms where children sleep, stoves in kitchens that feed the bread queue, and furnaces whose output reaches the Line under someone else's seal. The Diesel Resonance Plumbers curse those pipes and mend them anyway, because a cold pipe in winter means a riot, and a riot kills faster than fumes do.

Records is said to have reckoned that contraband may be tolerated at twenty per cent, since eradication would be inefficient. No such figure has ever been promulgated, and every competent inspector works to it. A marked convoy is surrendered. A Wick-Kid weeps at the proper volume. Canisters are stacked for the crowd, denounced, counted and then quietly misplaced. The Bureau of Tithes counts in public what was seized and in private what was not, and it profits from both columns.

Toleration is not protection. The sacrificed convoy has drivers. The chosen household goes into the wall. When an audit arrives, the junior Soot-Reader who carried the ash vials is the first name an inspector gives up. Distillers water their cuts and sell the poison dear. Inspectors plant rags soaked in diesel to meet the month's figure. Neither trade has any saints. Both trades contain widows.

#On Present Application

As of A.S. 201, the Anatolian Pitlands remain a Category Sigma contamination field. They are officially unregistered and unofficially mapped, and their crude is classed as precursor matter from the moment it leaves the seam. The designation is current. It is applied. On request, it produces a canister, a vial and a seized family at whatever rate the season requires.

No office claims to have authored it. Every office uses it. Purity samples under it, Records files under it, Tithes bills under it, and Doctrine refers to it as though it had always been there, which, so far as the Ledger is concerned, it has. The pits continue to seep. The convoys arrive on schedule. On the shelf in the confiscation yard, where Sigma-classed canisters wait for their lawful destruction, there is always a little less than there was the night before.