Most ancient burials announce themselves through mounds, enclosures, or standing stones. What came to light at Portraine in 1942, though, was far less ceremonial in appearance: burnt human bones, charcoal, and ash mixed into the shoreline sediment, interpreted by the geologist G. F. Mitchell as the scattered remnants of a funeral pyre.

Mitchell published his findings in 1945, noting that the deposit formed part of the beach material at Portraine, a coastal townland on the Fingal peninsula north of Dublin. A funeral pyre, in this context, means that a body was cremated above ground, the bones and fuel burning together before the remains were deposited or simply left where they fell. This was a practice with deep roots in prehistoric Ireland, though assigning a precise date to a surface find without associated pottery, metalwork, or formal stratigraphy is difficult. The record as it stands is spare: burnt bone, the suggestion of fire, a location on the edge of the sea. That sparseness is itself worth noting. Many of Ireland's known prehistoric cremations come from formal contexts such as passage tombs or urn burials, where the remains were carefully gathered and placed. Here, the evidence drifted into a beach layer, its original setting and date uncertain.

Portraine lies on the eastern coast of the Fingal peninsula, roughly between Donabate and Rush. The quay itself is a modest affair, and the shoreline is low and open. There is nothing at the site today to mark what Mitchell found, and the deposit has long since been absorbed back into the wider beach environment. Visitors walking the strand are unlikely to find any visible trace. The interest here is less in what can be seen and more in what the find suggests: that this quiet stretch of coast was, at some point in the past, the site of a deliberate act of cremation, close enough to the water that the remains eventually became part of the beach itself.