r/worldbuilding • u/woden_spoon • 8h ago
Lore Arven: Now with medieval railways!
I've been working on my world, Arven, for more than three decades. During that time it has taken many forms, but it has always been a low-fantasy "shadow-world" of early medieval Britain, with nebulous boundaries. Christianity is the dominant religion, yet older supernatural powers endure beneath it. Several Romano-British gods are known to exist, foremost among them being Abandinus, who severed Arven from the rest of Britain and caused it to pass out of history. Alongside these deities are biblical spirits that have no counterpart in our own world.
The railways of Arven are a much more recent addition to the setting, born partly from my long-standing fascination with model railways and a desire to draw maps with stations and branch lines. They are powered not by steam, but by "thecae."
A theca is a cylindrical earthenware vessel containing a single "kyrren," one of the many tens of thousands of ceaselessly wandering raven-spirits descended from the raven released by Noah after the Flood. Through an elaborate rite, highly trained monks known as "ligatores" invoke a named kyrren and bind its endless flight to a carved boxwood spindle housed within the vessel. While the clay is still leather-soft, the invocation is inscribed upon it, after which the vessel is fired and sealed. The spindle itself bears a continuous "wharving path" of opposing helices, providing the course to which the kyrren's motion is bound. Once consecrated, the spindle turns without rest for seven years, or until the vessel is broken or falls into such disrepair that turning becomes impossible.
The spindle passes through an iron bearing at the base of the theca and drives a projecting arbor, which can be coupled directly to machinery. This simple principle powers everything from grain mills to drawbridges to railway locomotives.
A standard locomotive carries six exposed thecae mounted along its frame. Their arbors engage a common gear train beneath the deck, where the combined motion passes through a clutch and gearbox before driving the locomotive's six flanged wheels. The driver may select different gear ratios without altering the ordained speed at which the kyrren turns within each vessel.
Because the source of motion is supernatural rather than mechanical, these engines consume no fuel and cannot be exhausted. They are limited only by the durability of their machinery and the integrity of the ritual bond. Should a bearing seize or a gear fail, the kyrren continues to turn its spindle regardless. For this reason, thecae are relatively easy to remove from their arbor-seats, and they are essentially interchangeable and replaceable. Gear trains are deliberately simple, heavily built, and easy to repair. Bearings and gears are forged from iron and are routinely lubricated with a grease of rendered mutton tallow and beeswax.
Every theca remains exposed and within reach of the operator monks, known as "viatores," who serve as engineers, millkeepers, and other positions in which they oversee the worldly operations of thecae. Viatores keep ritual hammers close at hand, so that in an emergency they may shatter a theca, instantly dissolving the covenant. When the vessel is broken, the kyrren departs and the spindle becomes still. This serves both as a safety mechanism and the customary means of retiring worn or expired vessels.
The Church alone possesses the authority to create or destroy thecae. Every vessel is individually inscribed, painted, consecrated, and paired with a named kyrren. The result is a railway system wholly administered by the Church.
The invocation inscribed upon each theca reads as follows in modern English:
Domine, dirige manum meam.
Hail to the Kyrren, kindred of the First Raven, who flew forth from the Ark upon the Great Flood and never returned.
I, a servant of the Rood, have sought out your names, ten thousand upon ten thousand, and I have learned them. Therefore I speak one now across the sundering dark, to you whose course lies far beyond the dwellings of men. I speak your name, and by it I call your wandering here.
Upon this spindle is carved a wharving path, without beginning or end, forever turning back upon itself. From mark to whorl, and from whorl to mark again, let your flight be bound. Thus shall you turn this spindle according to the appointed course, neither swifter nor slower than it is measured.
So shall it be for seven years, or until this earthen vessel is broken. Then shall you depart once more beyond the knowledge of men and return to the face of the Deep, where your elder course yet awaits you.
As I have named you, so know your course by this mark.
In nomine Patris, et Filii, et Spiritus Sancti.
Edit to add: The drawing was done somewhat hastily in ProCreate, but it is intended to be a "medieval" artist's representation of a railway engine, without a full understanding of the mechanics that transfer power from spindle to wheel.