Page "Achill Island" Paragraph 2

It is believed that at the end of the Neolithic Period ( around 4000 BC ), Achill had a population of 500 – 1, 000 people.

The island would have been mostly forest until the Neolithic people began crop cultivation.

Settlement increased during the Iron Age, and the dispersal of small forts around the coast indicate the warlike nature of the times.

Granuaile maintained a castle at Kildownet in the 16th century.