The discovery of the Céide Fields originally began in the 1930s when a schoolteacher, Patrick Caulfield, noticed linear piles of rocks which were uncovered as he cut away some peat for fuel.
[7] The unravelling of the significance of this discovery did not begin for another forty years when Patrick's son, Seamus, having studied archaeology, began to investigate further.
Investigations revealed a complex of fields, houses and megalithic tombs concealed by the growth of blanket bogs over the course of many centuries.
[citation needed] This involved the location and mapping of these hidden walls by probing with long T-shaped iron rods.
[citation needed] Seamus Caulfied has estimated that there is more than 100 km (62 mi) of stone wall hidden beneath the bog.