Few parts of a manor hold a longer memory than its walls. Long before anyone kept a paint chart, someone mixed a bucket of ochre distemper and brushed it over the panelling, and someone else pasted a flock paper in the morning room because the light there was too cold. Peeling back those layers without reading them first is like tearing pages from a book. With patience, a palette knife and a notebook, you can date most of what you find — and know exactly what you are covering up.

Read the Wall as a Sequence

Think of a wall as a stack of events rather than a surface. Lime plaster, then perhaps a skim, then a priming coat, then three or four schemes of paint or paper, then modern filler, then emulsion. Each layer has its own thickness, texture and behaviour, and the order matters more than any single colour. A crimson that looks thrillingly Regency may sit above four later coats and below two earlier ones.

The practical rule is never to open a wall in the middle of a painted field. Work at an edge — beside a door architrave, under a skirting, at the back of a cupboard — where the layers are exposed in section and you can count them like tree rings.

Where to Look First

Original decoration survives in the places nobody bothered to redecorate. Before you take a blade to anything visible, hunt for these:

• Cupboard interiors, linen presses and wardrobe backs, often painted once and forgotten.
• Window reveals, shutter boxes and the returns beside sashes.
• Behind skirting boards, dado rails and picture rails, especially where they have been raised or replaced.
• Under radiators, pipe runs and later boxing — the paint there is frequently the earliest scheme in the room.
• Door edges, hinge recesses and the tops of doors, which catch a brush only when a room is done properly.
• Understairs panels, attic partitions and old servants' passages, where economy beat fashion.

A lifted seam or a blister is a gift. Slide a palette knife beneath it rather than cutting, and you may lift a complete strip with its sequence intact.

Dating Wallpaper

Hand-blocked papers dominate until roughly the 1840s, and they give themselves away. Look for slight misregistration between colours, where a block has slipped a hair; for visible joins every fifteen inches or so, since early papers were made in small sheets and hung in horizontal strips; and for hand-mixed colour that varies across the repeat.

Print, texture and paper

Flock papers — raised patterns of chopped wool on a painted ground — were a luxury from the seventeenth century onward and are unmistakable to the fingertips. Embossed and relief papers imitating plasterwork or leather belong largely to the nineteenth century. Roller-printed papers arrive from the 1840s with flatter, more uniform colour, and later the first aniline dyes, which can fade to surprising pinks and greys. The paper itself is a clue: rag paper stays supple and can often be lifted, while wood-pulp paper from the late nineteenth century onward turns brittle, browns and foxed.

Dating Paint

Interior paint divides broadly by binder. Soft distemper — chalk, glue and pigment — is matt, powdery and lifts off with a wet cloth. It was the standard finish on plaster for centuries and reads beautifully chalky; it cannot be washed, which is why it so often survives beneath later oil paint. Limewash behaves similarly. Oil-bound paints appear more widely from the eighteenth century, harder and glossier, carrying brush marks and the gradual yellowing of linseed oil. A cream you uncover may well have started life as a white.

Twentieth-century layers are easier to spot: emulsion from the mid-century, then alkyds, then vinyl and acrylic finishes, all thinner, more uniform and rarely with the depth of an old oil. If a colour sits directly on bare plaster with a faint chalky bloom, treat it as early. If it sits on a pink or grey primer, it is almost certainly modern.

Sampling Safely

Old coatings deserve respect. Paints made before the 1960s commonly contained lead, and some textured coatings and boards contain asbestos. Dust, not contact, is the risk. If you suspect either, stop and arrange a professional survey before disturbing the surface — this is not work for guesswork, and a specialist's fee is small next to the cost of getting it wrong.

1. Photograph the wall first, with a tape measure in shot for scale.
2. Choose the least visible edge and work outwards, never inwards.
3. Mist the area lightly to hold dust, and wear gloves and a suitable mask.
4. Lift paper with gentle steam and a palette knife; avoid sanding entirely.
5. Cut a small square of paint down to the plaster, ideally from two places in the room.
6. Bag each sample separately, label it with room, wall and date, and store it flat.

Matching the Colour

Grime flatters nothing. A century of soot and tobacco darkens every colour, so clean a small, unseen patch with a damp cotton bud before you judge it. Examine the third or fourth layer rather than the first, which is often a primer, and match the finish as carefully as the hue — distemper and eggshell in the same colour read as two different paints.

Ask a specialist paint maker to match from the physical sample, not a photograph. Phone cameras adjust white balance and will quietly rewrite your green. Order two A3 boards, painted in two coats, and pin them up in the room. View them in morning light, in the late afternoon, and again with the lamps on.

Keep the Evidence

The aim is not to reproduce a house museum, but to know what you are changing and why. Keep a wall-archaeology file: sample bags, photographs, a simple plan of the room showing where each came from, and a note of the date. If you later repaint, restore or sell, that folder becomes the most useful document in the house. And where lead, asbestos or failing plaster is in question, bring in a qualified surveyor rather than trusting to luck.

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