23Harbison, Peter. Pilgrimage in Ireland: the Monuments and the People. Syracuse, NY: Syracuse Univ., 1992. 101.
The author noted the mortar dating information soon after Professor Ranier Berger and his colleagues analyzed a sample of the mortar from the oldest part of Teach Molaise which provided a calibrated radiocarbon date of AD 700-900, suggesting "that the building is not only early in the history of mortared stone buildings in Ireland, but is probably the earliest surviving ecclesiastical structure on the island."