A Cartography of Signals
The Vorek Ledger is the only surviving colour inventory of the signal flags flown by the Salt Road Company, a short-lived monopoly that moved brine, wool and whiteware along the upper reaches of the north-western waterway. The ledger was compiled between 1761 and 1764 by a purser named Anselm Vorek, who had been hired to standardise the company’s private code after two years of costly collisions and misread orders in the river roads.
Vorek’s method was unusual. Instead of drawing flags in plan, he painted small plates with the exact pigments used in the sail loft, noting the hoist, the fly, the type of charge and the intended light conditions. The result is a book that reads less like a working maritime manual than like a botanist’s field guide: each plate is treated as a creature of the road, with its own season, call and careful description.
What follows is a digital reconstruction of nine plates from the original ledger, together with a short reading key for the visual grammar Vorek used. The collection below is filterable by category, and every plate can be expanded in place or opened for closer inspection.
How to Read a Plate
The flags in Vorek’s code are built from a small grammar of fields, charges and shapes. The field is the background colour of the cloth. The charge is the emblem painted or sewn upon it — a wheel, a pennant, a cross, a lantern, a star. The hoist is the edge of the flag nearest the mast; the fly is the far edge. Most flags in this collection are rectangular, but two are swallow-tailed pennants, cut that way so they could be read against the surface of the water rather than against the sky.
Colour was never decorative. Red fields, made from ochre and iron salts, signified immediate danger to the hull or the crew. Black fields, made from lampblack, signified the presence of the company’s own boats or the need for silence. Yellow fields, made from lead-antimonate, signified inspection, counting or quarantine. Green fields, made from copper earths, signified a night signal or a change of watch. The blue field used for command flags was the most expensive pigment in the whole ledger: true indigo, bought from the eastern trade.
Every plate in this ledger is best read by moving from the field to the charge, and then to the shape of the fly. A swallow-tail always indicates weather. A rectangle always indicates a command or a primary signal. A repeater is always black, no matter its charge. Vorek wrote that his code “should be legible at one hundred yards by a boy with one eye bandaged”, and the plates are drawn to that standard.
The Recovered Plates
Use the category filter to sort the plates. Each entry can be expanded in place, and the View plate link opens the full figure.
The Cindered Cog
1742
Read the entry
Signal: Machinery in motion — keep clear of the cargo derrick lanes.
The cogwheel was painted with red ochre and linseed oil, its teeth picked out in gilded lead-tin yellow. It flew from the foremast whenever the dockside cranes were moving and hauliers were ordered to walk their teams wide of the swing arc.
- Charge
- A toothed wheel of eight spokes
- Colours
- Red field, black wheel, gilded teeth
- Hoist
- 1.5 ells
The Widow’s Pennant
1747
Read the entry
Signal: A squall is reading the water from leeward.
Cut as a long swallow-tailed pennant, it carried a waxing crescent of white lead on a black ground. The shape was meant to be seen from the quarterdeck in breaking light, when the sea and the sky had not yet separated.
- Charge
- A waxing crescent
- Colours
- Black field, white crescent
- Hoist
- 1.25 ells
The Halyard Cross
1751
Read the entry
Signal: Haul all halyards and make fast; the fleet is preparing to weigh.
Two uneven white ropes, each twisted from three strands, cross on an indigo field. The use of rope imagery was a rebus: the halyards themselves were the message, and the cross told the deck crew which lines to tend first.
- Charge
- Two crossed ropes
- Colours
- Indigo field, white ropes
- Hoist
- 1.5 ells
The Gilded Quarantine
1739
Read the entry
Signal: Plague inspection under way; hold at cable-length.
The quarantine flag was flown from the jackstaff, never hoisted above another signal. Its black diamond, set on lead-antimonate yellow, was surrounded by a narrow gilded border that caught the sun and marked the ship as one under the port physician’s authority.
- Charge
- A black diamond with gilded edge
- Colours
- Yellow field, black diamond, gold border
- Hoist
- 1.5 ells
The Lantern Turn
1745
Read the entry
Signal: Turn your stern lantern toward the fleet for recognition.
A lantern with a horn window and a tongue of orange flame was painted on a green field. Vessels approaching a night anchorage flew it from the taffrail and then turned the real lantern to face the outer road.
- Charge
- A lantern with flame
- Colours
- Green field, white lantern, orange flame
- Hoist
- 1.5 ells
The Salt Rake
1756
Read the entry
Signal: All hands to the salt pans; a light has been sighted over the southern marsh.
Three diagonal red bars, like the tines of the salt rakes used in the company’s pans, were painted on plain sailcloth. The flag meant a false light was burning and the shore crews were to rake the pans into defensive lines.
- Charge
- Three diagonal rake tines
- Colours
- White field, red bars
- Hoist
- 1.5 ells
The Ember Wyrm
1760
Read the entry
Signal: Repeat the previous signal; follow the course exactly as shown.
A single serpentine line of orange lead spirals down a black field, turning four times. The wyrm was used as a repeater: it gave no new order but told the following ships that the last hoist was to be obeyed with particular care and held for a full glass.
- Charge
- A serpentine orange line
- Colours
- Black field, orange lead
- Hoist
- 1.5 ells
The Broken Mast
1741
Read the entry
Signal: Dismasted vessel in the road; send a shore boat.
A fractured mast, drawn with a clean break and two falling splinters, was the company’s most dreaded signal. It was so simple that it could be sewn aboard a damaged ship from torn sailcloth and spars.
- Charge
- A broken mast with splinters
- Colours
- White field, black mast
- Hoist
- 1.5 ells
The Tally Star
1758
Read the entry
Signal: Count and report the cargo by starboard watch.
A five-pointed star, overlaid with a single counterclockwise orbit, was flown when the company’s factors came aboard to tally chests, barrels, and bales. The orbit indicated the direction the purser should walk around the main hold.
- Charge
- A five-pointed star with orbit
- Colours
- Yellow field, black star, gold orbit
- Hoist
- 1.5 ells
On Conservation and Colour
The original plates in the Vorek Ledger are not what they were in 1764. The indigo of the command flags has bitten into the paper in the way indigo always does, leaving a deeper and colder blue than the men who mixed it would recognise. The yellow fields, once bright lead-antimonate, have flattened to a dull mustard, and the brass-green of the weather flags has browned at the edges where the pigment reacted with light.
This digital reconstruction restores the colours as closely as the remaining material allows. The reds are based on the dry residue of ochre found in the spine of the ledger; the yellows on a single well-preserved patch of lead-antimonate beneath a torn corner. The black fields are the easiest to recover, because lampblack is nearly inert. Vorek’s pages tell us that the original green was mixed from copper earths and a little chalk, and the orange of the wyrm was lead oxide, which has now darkened almost to brown.
Some plates are missing entirely. The ledger’s title page lists thirty-one flags, but only nine plates survive in usable condition. The rest are either too damaged to digitise or survive only as written descriptions. Where a shape was uncertain, the reconstruction chooses the most conservative reading of Vorek’s notes, and every plate is offered as a considered version, not as a perfect facsimile.