Carreg-y-tair Eglwys

... a few are inclined to believe that the [cairn] on the mountain above the Church must be Carnedd Illog, owing to its proximity to Illog's Well, and other names connected with [the saint's] name; while others point to the one on the highest eminence on Croes-forwyn, as the identical one. This is known as "Y garn", the cairn, the chief of the cains, near which is a stone called "Carreg y tair Eglwys", the stone of the three churches, from which the old people of the neighbourhood were wont to assemble on a Sunday morning, to know which of the three church bells, Llanwddyn, Llanfihangel, or Hirnant, could be heard most distinctly on the occasion, and to obey the call of such a one, by attending Divine Service at that particular church.

It is customary, to this day, to ring the church bells of the above parishes at 9 o'clock, an hour before commencement of the service, and formerly there were three ringings, at intervals of an hour.