A ten-year hand survey of one moor

The slowsurvey.

Every autumn, Mara Vale walks the same 6.4 kilometres of Black Fell, taking bearings, noting water, and revising a map that will never quite settle.

Move across the field: your cursor adds a little height. Contours take their time to agree.

south-west ridge

01 / Why one place

A map is not a verdict.

In 2016, surveyor Mara Vale set out to make a clean plan of the 340 acres above Harker Bridge. The first winter proved that there was no clean plan to make. Peat hags slumped after rain. A new sheep path appeared beside an old one. The spring marked “dry” had water in it by June.

So she changed the question. Instead of fixing Black Fell in one drawing, she would return with the same compass, a plane table and a notebook until the changes became the subject. The survey is a record of attention, not possession.

Fixed points / moving ground

Field ledger

Four pegs and one red-topped cairn hold the work in place. Everything between them is allowed to wander.

REFERENCE STATIONS · RECHECKED OCT 2026
StationCoordinateAltitudeField condition
01 / Gate stoneNY 6812 3468412 mIron staple remains; wall leans north.
02 / Red cairnNY 6779 3494458 mTwo fresh stones placed after February gale.
03 / Sphagnum wellNY 6756 3451431 mOpen water only after a dry fortnight.
04 / Ash springNY 6826 3427398 mFlow now reaches the old sheepfold.

02 / The return walk

Pace, pause, listen.

No drone imagery, no overnight result. Mara walks after the rush of bracken but before the first hard frost, when the ground is legible underfoot. The route stays constant; the stops are where the work deepens.

18 OCT 2017

Water moved uphill

A three-metre tongue of wet peat had pushed across the old fence line. Its edge was drawn with a boot heel, then measured again from the gate stone.

7°C / mist
02 NOV 2020

The absent path

The shortcut to Harker Bridge had vanished under heather. A longer route, wide enough for two ponies, had formed along a contour that did not exist in 2016.

3°C / still
28 OCT 2023

Cairn after rain

The red cairn stood dry while the hollow below held water for six days. A pencil cross on the sheet became a shallow basin, then a question mark.

9°C / rain
11 OCT 2026

Tenth circuit

One new alder, four missing fence posts, and a spring louder than any previous note. The line is redrawn, but the older lines remain beneath it.

11°C / wind

02.5 / A section through the west slope

No two visits
find the same ground.

The field is generated again here, away from the introduction: a live slice through the same unstable record, held between fixed coordinates. Revisit the dated sheets to see the water table alter the drawn ground.NY 676 345 → NY 683 350

2016

Baseline sheet: the bog crossing is dry by 10:40.

What the lines keep.

Not findings. Evidence.

A / 01

The moor drains later now.

Each autumn the lower swale retains water a little longer. The change is small enough to miss in a season and plain enough to trace over ten.

12 later-flow marks since 2016

B / 02

Paths are negotiations.

A sheep route, a walker’s detour and an access repair overlap for a year, then pull apart. The map gives each a date rather than choosing a winner.

C / 03

Accuracy can be tender.

The work measures to the metre, but it does not pretend the place has one permanent edge. Every sheet carries a date, a weather note and a doubt.

1:2500 / hand revised

03 / Open sheets

Come with
dry boots.

On the first Saturday of October, Mara lays the current sheet beside the previous nine in Harker Bridge Reading Room. Visitors can trace an old line, add a sighting from the path, or simply look at how a familiar hill resists being finished.

Field day / 02 Oct 2027

return to the field edge ↑