Reading Old Maps to Find Forgotten Beacon Sites

Most walking guides point you at the obvious: a trig pillar, a cairn, a viewpoint arrow on a car park sign. But the British hills are covered in older marks that modern guidebooks rarely bother with — beacon stances, fire sites, watch points, the places where the warning chain was lit. They are on the maps. You simply need to know which maps, and what to look for.

Why the old sheets still repay a look

The Ordnance Survey's first county series at six inches to the mile were surveyed largely between the 1840s and the 1880s, before reservoirs, conifer blocks and airfields reshaped the uplands. The surveyors walked the ground and recorded what they found: field names, boundary stones, small antiquities, odd little enclosures on summits that had no obvious agricultural purpose.

They were building on earlier work. Estate maps, tithe maps and enclosure awards often carry field names that have since fallen out of use entirely. A beacon that stopped being used in the sixteenth century may survive as a field name on a tithe map, then as a "Beacon" label on the first edition OS sheet, and then vanish from the twentieth-century editions altogether. That disappearance is exactly why the old sheets matter.

The vocabulary of fire

Start with the words. Search these on any historic map of an upland or coastal parish:

• Beacon — the plainest form. Beacon Hill, Beacon Field, Beacon Stance, The Beacons, Beacon Plantation.
• Baken, Bakon, Bacon — worn-down versions of the same word. A "Bacon's Hill" deserves a second look before you dismiss it.
• Watch — Watch Hill, Watch Field, Watch Point. These are often warning posts rather than fire sites, but the two went together.
• Fire — Firestone, Fire Hill, Fyrhylle, and the various bonfire names.
• Armada, Spaniard, Spanish — 1588 associations. Sometimes genuine, frequently folklore, always worth checking against the terrain.
• Signal — coastal signal stations, mostly nineteenth-century, marked on later sheets with a small building symbol.

Symbols matter as much as words. On six-inch and 1:2,500 sheets, look for a small circle, triangle or star accompanied by a label. On modern 1:25,000 and 1:50,000 mapping, a beacon is sometimes retained in italic type, sometimes reduced to a small dot. Where a triangulation pillar stands on a beacon site, take it as a strong hint that the view was worth having.

Finding the sheets without leaving the house

County record offices and local studies libraries hold the originals, and most will let you photograph them. More useful for planning is the growing set of georeferenced historic layers available from the national map archives, which let you fade a nineteenth-century sheet in and out beneath modern mapping on a screen.

Two other sources are worth the trouble. Tithe apportionments come with an accompanying map and a schedule of field names, so you can search the text for "beacon" and then plot the field. Parish boundary records are equally good, because beacons were very often set on boundary junctions — a point where three parishes meet, high and visible, was ideal. If you find a name recurring at a boundary meeting point, you have probably found your stance.

What you may see on the ground

Arrive with modest expectations and you will not be disappointed. The commonest outcome is nothing at all — a grassy summit and a lot of sky. But look for:

• A flattened, slightly dished circle of shorter grass or bare earth on a summit shoulder.
• Burnt stones, reddened earth or charcoal flecks, which show up best after rain when the surrounding ground is dark.
• Place-name evidence carved into a boundary stone, gatepost or wall coping.
• A low ring of stones or a mound that does not quite read as a cairn.
• Bare, well-worn ground on a point with no modern use to explain it — not a path junction, not a viewpoint.

Even where nothing survives, the map has told you something real: this hill was chosen, once, for a purpose. Standing there is the point.

Tracing a beacon chain

Beacons worked in chains, each within sight of the next, so the sites are rarely random. Plot the ones you have found on modern mapping and look at the sightlines. You will often find the chain running along a ridge or following a coastal escarpment, with each stance set slightly back from the edge or just below a summit to stay out of the worst weather.

That gives you a structure for a walk with an argument to it: two or three stances linked by a right of way, with a fourth visible across the valley that you cannot reach today. Note the ones that fall on private ground; the view from the nearest footpath often shows the same sightline.

Access, safety and a little restraint

Check open access land and rights of way before you go in England and Wales; in Scotland the right of responsible access covers most open country, though not enclosed farmland or growing crops. Where a stance sits on private land, ask at the farm — a polite enquiry about a historic beacon usually gets a friendly answer and often a better route than the one you had planned.

Do not dig, metal-detect or move stones. Scheduled monuments are protected by law, and unrecorded sites deserve the same care. Take a paper map and a compass as well as a phone, tell someone your route, and remember that moorland ground hides holes, bog and old shafts very well. Beacons were sited for visibility, which means they are exposed; a still afternoon on the summit can turn vicious in twenty minutes. Go early, go equipped, and leave the hill as you found it.