Skomer is sometimes called Skalmey on old maps and texts. The name Skalmey is of Viking origin, coming from two words “skalm” meaning a short sword, or cleft or cut, and “ey” meaning island, thus Skalmey or Cleft Island, probably referring to the fact that the island appears almost cut in two, joined only by the narrow strip of land known as The Isthmus, leading to The Neck, or possibly due to the deep cut sea cliff in the south of the Island, The Wick. Many islands around the Welsh coast have names that are Viking in origin although there is no hard evidence of their presence on Skomer. The current name Skomer derives from Skalmey, its spelling and pronunciation having mutated over the years.

On the mainland we know that there were nomadic hunter-gatherer communities in south west Wales around 37,000 years ago. At that time Skomer would have been part of the mainland, it only becoming cut off as an island following the sea level rise at the end of the last Ice Age around 12,000 years ago. There is no clear evidence, bar a few flint flakes, that the area now known as Skomer was used by these hunter-gatherers.

The main settlement of the Island can be dated from between 5000 and 2000 years ago. Evidence and remains from this period, known as the Iron Age, can be seen all around the Island. The remains of huts, fields and cairns (possibly burial cairns) on Skomer are some of the most complete and untouched remains of this period in whole of Europe. Their presence indicates an Iron Age farming community of up to 200 people. The importance of the site has been recognised with most of the island designated as a Scheduled Ancient Monument.

Following the Iron Age settlers, there is no clear history of habitation until the Middle Ages, when in the 13th century rabbits were introduced to the Island. Rabbits were brought to the British Isles by the Normans and were a valuable source of food and fur. From the 13th century up until today rabbits have been a vital part of the island’s life. Initially, they were very important to the people who lived or farmed there and were a major export from the island to local markets. They have become even more important recently as the main grazing animal on the Island, maintaining the short vegetation and plant diversity.

The Old Farmhouse ruin, seen today in the centre of the Island, dates from about 1840 but a similarly substantial house is first thought to have been built on the site around 1700. The slightly thicker soils in this part of the Island, and access to water from North Valley enabled a range of crops to be grown, and large fields were established around the farm with long straight stone wall boundaries. There are records of the farm supporting three families at one stage with cows and sheep grazing the Island, as well as horses to help with the heavy work. Farming was largely abandoned after the outbreak of the First World War and all agriculture on the island finally ended in 1950. In 1959 the Island was bought for the nation by the Nature Conservancy (the Government department that became the Countryside Council for Wales) helped by the West Wales Field Society (the charity that became the Wildlife Trust of South and West Wales). It was declared one of the country’s first National Nature Reserves.

Lime kilns
There are two quite large 19th century lime kilns on the Island: one below the Information and Welcome Point, at the top of the path from the beach at North Haven, and one above the Information and Welcome Point, below the Harold Stone. Lime was important on the island both to be used as mortar for the buildings and to spread on the land as a fertilizer, the volcanic rocks of the Island not giving rise to naturally fertile soil. Limestone and coal would have been imported from the mainland, landed on the beach at North Haven and then moved to the kilns where it would be heated.

Harold Stone
This feature is one of Skomer’s mysteries. It may date from the Iron Age, it is largely unshaped by human hands, with no obvious cutting or tool marks, although the corners seem to have been smoothed, possibly by years of cattle or other animals rubbing themselves on it. As with many standing stones, its function is unknown and the origin of the name is also lost. Perhaps it was a marker for approaching boats to head towards or the sign of something or someone guarding the island!

The Old Farm Complex
The Old Farmhouse was once an impressive and substantial house with early pictures showing a fancy metal veranda running the length of the house. At the back, northeast corner of the building is an old smoking oven where fish and meats would have been preserved. The Old Farmhouse is built in traditional Pembrokeshire vernacular style with small slates protecting the front of the house, fixed in mortar. The current farmhouse was built about 1840 and was lived in by various tenants and owners of the island:

• Lord Kensington bought the island in 1897 and used it mainly as part of his sporting estate.
• Mr J J Neale, a trawler owner from Cardiff, leased the Island in 1905 with the aim of protecting the wildlife, but he had to relinquish the lease later and it was subsequently bought by a well-to-do dentist, a Mr Sturt, who did stay on the Island with his family, and whose daughter eventually married a local man Reuben Codd.
• The Codds then farmed the Island until the outbreak of the Second World War in 1939.
• The Island became a Field Study Centre for a year (1946), run by the West Wales Field Society and visitors stayed in the house.
• In 1950 the Codds finally left the Island completely, and in 1954 the roof of the Old Farmhouse was severely damaged during a major storm and left as a ruin for many years.
• The Skomer Island Heritage Project enabled the Old Farmhouse to be made safe, and for shelters, interpretation and even a number of windows to be reinstated. This allowed the building to be used by visitors once again. Where the Assistant Warden’s and Volunteers’ accommodation blocks are now was once sheds and pigsties. The Visitor Centre would have housed machinery such as the grinding and threshing machines. If you look outside the Visitor Centre, behind the buildings, there are two raised horse walks where the farm horse would have walked in circles turning wheels that would have powered this equipment. At one stage there were holes through the walls through which the crank shafts linked horse to machine. The Old Barn, now residential visitor and research accommodation, was a substantial two-story barn for storage and animals. 

Boundary walls, banks and terraces
All around the Island are old walls, banks and terraces. As the land is worked by farmers, both ploughing and grazing animals, the soil tends to move downhill, accumulating against banks or walls. These features give us the first indications of Iron Age and subsequent farming on Skomer. The relatively high and straight walls that are around the Old Farmhouse Complex are much more recent, but probably used the stones from the ancient walls, with the later farming activity in this area, particularly ploughing, hiding all traces of the previous ancient field systems.

If you walk from the Old Farmhouse towards the Garland Stone you will follow a 19th century wall, even using it as the footpath where it crosses North Valley Stream. At the right time of year at this point, you can see ridges and furrows or shallow troughs, with heathers, bracken and brambles growing on the ridges, and grasses and marsh plants growing in the troughs. This is evidence of an old ploughing system, five-step ploughing, which enabled crops to be grown on the drier raised ground.

Iron Age settlements
There are a number of discrete Iron Age settlements around the Island, each one slightly different. In the north moving out of North Valley towards the Garland Stone, looking towards North Pond, when conditions are suitable, the remains of a number of circular Iron Age huts in pairs can be seen. An information panel in the Old Farmhouse shows how a settlement might have looked.

Around the huts were several small enclosures probably for smaller animals such as pigs or fowl. Remains of the walls may be seen either as mounds or banks or sometimes as obvious stone slabs, and often natural rocky outcrops were incorporated into the enclosures. It is likely that some fields were used for growing crops, with the walls keeping grazing animals out rather than in!

Near the Garland Stone there is a short circular detour off the main path across a ridge where a group of nine small cairns have been identified. This probably is a prehistoric cemetery, with the cairns marking burial sites.

As you walk around the coast you will walk over or through the remains of many Iron Age walls. Often only the larger stones or grounders remain. The smaller stones and rubble that would have filled the gaps have long disappeared. If you take the track from Skomer Head back to the Old Farm Complex, after a short distance you will come across both Iron Age and more modern boundary walls running parallel to each other. The modern one is close to the path and the prehistoric one on the rock ridge above.

Wick Valley just off the main path opposite where the path from the Old Farmhouse Complex meets the path from The Wick to High Cliffs, there is one of the best examples of an Iron Age hut and associated small enclosures, clearly visible all year round. Unlike the hut circles in the north of the island here the hut is a single circle and a number of small enclosures can be seen around it.

The Neck
Looking at The Neck from High Cliffs or from the path alongside South Haven to Captain Kites, an obvious ditch and bank can be seen at South Castle. Unlike the rest of the island there are few field boundaries to be seen on The Neck and it is thought that the whole of the area could have been used for grazing animals, with the ditch and bank fortification in the south offering an area where they could be herded and protected if there was any threat from the mainland.

Dams on streams
Between Skomer Head and The Wick you will cross Wick Stream. You will cross on top of a stone causeway or wall and if you look up and down the stream you may be able to pick out six others. These seven dams seem to adjoin and be part of the Iron Age walls but they might also be of much later origin. Their purpose is not known but most likely they were for water conservation, creating ponds for storage of water and watering stock. A number of similar, more substantial dams were also found on the course of North Stream at the bottom of North Stream Valley. Again they could have been for water storage, and it has also been speculated that they might have been mediaeval fish ponds.