found: Work cat.: Geissel, H. A road on the long ridge : in search of the ancient highway on the Esker Riada, 2006:p. vi (Eiscir Riada) p. ix (the Slí Mhór largely coincided with the Esker Riada and extended from Dublin Bay in the east to Galway Bay in the west. The Esker Riada as a geographical feature was physically discontinuous)
found: Wikipedia, 2 Oct. 2006(the Esker Riada divides the northern and southern halves of the island and its ridge once served as the main highway connecting the east and west coasts)
notfound: GEOnet;Col. gaz.
