Most people look at old maps the wrong way.
They see them as pictures. Pretty objects to hang on a wall, or to zoom into on a website when they are feeling curious about the past. They notice the elaborate cartouches or the occasional sea monster lurking off a coastline. They admire them, then they move on.
That is a waste of one of the most powerful research tools available to a local historian.
An old map is not a picture. It is a document. It records decisions — what was here, what was named, what mattered enough to include. And like every document, it rewards the reader who learns how to question it properly. Ask the right questions of an old map and it starts talking. Ask nothing, and it just sits there looking handsome.
For me, this is where local history detecting always begins.
What a Map Can’t Tell You
Before getting into what old maps reveal, it is worth being clear about what they don’t.
A map from 1840 does not show you what 1840 looked like. It shows you what the surveyor recorded for a particular purpose and within the constraints of the technology available to them. Every map has an agenda. Tithe maps were produced to record who owned land, because the Church needed to know who owed tithes. Enclosure award maps were drawn up to formalise the redistribution of common land to private owners. Military maps (including early Ordnance Survey) were made because the government needed to know the landscape for strategic reasons.
That agenda shapes what gets recorded and what gets left out. A tithe map will be extraordinarily precise about field boundaries and ownership, but will tell you nothing about the pub at the crossroads. An estate map will show you every building on a landowner’s property in loving detail. The farms of the tenants one valley over won’t exist.
Understanding why a map was made is the first step to reading it properly. Once you know the purpose, you start to understand the silences as well as the marks.
The Three Maps Every Local Historian Should Know
England is unusually well-served for historical mapping. Three types of map are, between them, capable of taking you back across several hundred years of landscape history.
The Ordnance Survey (1840s–1890s)
The Ordnance Survey began its systematic survey of England in the late eighteenth century, initially for military purposes, and by the middle of the nineteenth century had produced large-scale maps covering the whole country. The first edition six-inch-to-the-mile maps are, for most local historians, the starting point.
These maps are remarkable documents. They were made at a time when England was industrialising rapidly, when railways were arriving, when towns were expanding at a pace no previous generation had experienced — and they caught the country in the middle of all of that. A first edition OS map of your local area shows you the landscape at a pivotal moment: old enough to still carry the bones of the pre-industrial world, recent enough to be legible and accurate.
They are available for free via the National Library of Scotland’s map viewer, which holds digitised first and second edition OS sheets for the whole of Britain. You can overlay them against a modern map to see, with extraordinary clarity, what has changed and what has survived.
The tithe maps (1836–1860)
The Tithe Commutation Act of 1836 required that tithes be converted into a cash payment. To calculate what each landowner owed, surveyors had to map every parish in England, recording every field, every building, and the name of every owner and occupier.
The result was one of the most comprehensive surveys of the English landscape ever made. Tithe maps exist for roughly three-quarters of English parishes, and they are accompanied by apportionments, which were detailed schedules listing the plot number, the owner, the occupier, the name of the field, the acreage, and the land use. When you look at a tithe map, you are not just looking at a landscape. You are also looking at the names of the people who worked it.
Tithe maps are held at county record offices and at The National Archives at Kew. Many have been digitised and are available online through county archive websites and through the National Archives Discovery catalogue.
Estate maps and enclosure award maps (17th–19th century)
Before the Ordnance Survey, the most detailed maps of the English countryside were produced by private surveyors working for individual landowners. Estate maps vary enormously in quality and coverage, but the best examples are detailed records of a particular piece of landscape at a particular moment. They can show you the layout of farms, the course of field boundaries, the position of buildings, and even the names that people used for individual fields (names that often carry centuries of history in themselves).
Enclosure award maps, produced when common land was enclosed by Act of Parliament, are similarly precise. The award maps show the pre-enclosure landscape and the new arrangements side by side, which means they are among the few historical documents that record both what a landscape looked like before enclosure and what it became afterwards.
Both types are usually held at county record offices. The catalogues of the relevant archive will tell you what survives for your area.
Learning to Read What’s on the Map
Once you have the right map in front of you, the detective work begins.
Field names
On tithe maps and the accompanying apportionments, individual fields are named. These names are compressed history. A field called the Marl Pit tells you where marl was excavated, marl is a calcareous clay used by medieval farmers to condition acidic ground. A field called the Hopyard tells you hops were grown there. The Gallows Close is self-explanatory and Furlong Field or Acre Close suggest open-field strips that survived enclosure, or that at least the memory of them did.
A systematic survey of the field names in a tithe apportionment for your parish will give you a working picture of the landscape’s economic and social history. Names preserve things that documents sometimes don’t.
Road patterns
The pattern of roads on a first edition OS map is one of the most legible records of landscape history available to a non-specialist. Straight roads with wide grass verges are almost always enclosure roads, laid out by parliamentary commissioners in the eighteenth or nineteenth century. They tend to run at slightly awkward angles, cutting across the landscape without reference to older routes. Winding lanes that follow field boundaries, hug contours, or converge on a particular point are almost always ancient, following routes that predate any systematic planning by centuries.
A lane that runs directly to a church, then stops abruptly, is probably a corpse road — the route along which the dead were carried for burial. A track that leads purposefully towards a stream crossing, then seems to disappear, may be following the line of a drove road used to move livestock to market; the rest of the road across the stream being erased by later farming or neglect. The roads on old maps are not just connective tissue. They are evidence.
Settlement patterns
The position of buildings on a first edition OS map tells you a great deal about how a settlement developed. Houses clustered tightly around a church and village green suggest a nucleated medieval village, a planned community with its roots in the open-field farming system. Buildings strung along a road, widely spaced, suggest a different origin: a settlement that grew incrementally rather than by design, or one that expanded along a road as traffic increased.
Isolated farmsteads sitting in the middle of large regular fields, with no older settlement nearby, are often the product of enclosure. The physical evidence of a farmer who took their allotment and built on it, away from the village. Look for these patterns and you start to understand not just where people lived, but how and why they organised themselves the way they did.
The Practical Starting Point
You do not need to visit an archive to begin. The National Library of Scotland’s map viewer is free, requires no registration, and holds first and second edition Ordnance Survey maps for the whole of Britain. Old Maps Online aggregates historical map collections from archives across the UK and further afield. The National Archives’ Discovery catalogue lets you search for tithe maps and apportionments by parish.
Start with your own street and your own town. Open the first edition OS map and set it against the modern view. Give yourself twenty minutes and see what questions it raises.
That is the only method that matters at this stage. Not answers. Questions.
A good old map gives you, like all good maps, a path to follow. The detective’s task is to see where it takes you.
Thank you! I love love love a map. Especially the old ones.