We do not know when the first people arrived in Unst, Shetland’s northernmost island, or where they came from. As there were Mesolithic people in the Western Isles eight thousand years ago and recent traces have been found in Orkney it is just a matter of time before evidence is found in Shetland. It is possible that their dwellings were made of wood, which was available, or of simple skin covered tents.
As they were hunter gatherers their dwellings would be temporary as they would often be on the move. With a sinking land/rising sea level all traces may have been erased. The other possibility is that evidence may still lie beneath the layers of peat which were laid down at a later date.