and arrival in the ancient legends and myths often signifying stories concerning drownings, a dangerous wave or tidal bore, overseas arrivals and corporeal remains found in the inter-tidal wrack of the estuary. Tráig Inbir or Tráig Indbir Colpa, the Strand of Inbher Colpa, a counterpart to Mornington, was within the wider area of Tuath Inbhir (i mBregaib) between the Boyne and Nanny. The origin of the name is associated in myth with Colpa an Chlaidhimh ("of the Sword"), a son of Míl Espáine in the Milesian origin of the Irish, an invader who was drowned by a wave in the attempt to land, and by tradition is buried behind Colp church in a ringfort touching on Mornington's boundary. While Colpa drowned, Érimón, his eldest brother, made safe landing in this place and became one of the first Milesian High Kings of Ireland. An alternative Dindsenchas tradition, a body of literature in verse and prose form on the origin of famous places, associates the variant name Inber Colptha with the Máta, a massive aquatic creature which occupied a once submerged plain around Dundalk, Magh Muirthemne, and which was killed and dismembered on a stone, Liacc Benn, on top of Newgrange in Brú na Bóinne, by the Dagda and parts thrown into the Boyne. What can be described variously as its limb, shank, calf of the leg, or shinbone (colptha) reached the estuary giving name to Inber Colptha. The colptha probably called to mind the narrow channel of the Boyne at this point and played on the original word Colpa. Áth Cliath, "the hurdled ford", the Irish name for Dublin, is explained in the same Dindsenchas account referring to a hurdle of bones, the ribcage of the Máta. Other associations in myth include The Tragedy of the Sons of Tuireann, Togail Bruidne Dá Derga, Lebor Gabála Érenn, the lives of various saints, Acallam na Senórach, other Fenian Cycle tales and the Dindsenchas tradition. The aetiological explanation for the Boyne itself was an out-surging of the Well of Segais on Síd Nechtain, the mythological form of Carbury Hill belonging to Nechtan, which tore apart and drowned his wife the goddess Boann, in a flood of water, and in some versions her lapdog Dabilla, before sweeping out to sea giving the generic name Inber Bóinne or Inber Bóinde to the Boyne estuary. In Acallam na Senórach, c. 1200, the upper estuary near Mainistir Droichit