in cuiusdam summitāte montis extendentis sē longē in ōceanum, in locō quī dīcitur Sēdēs Brendānī (4.2).  The mountain, now called Mount Brandon (or Brandon Head) was already associated with Brendan at the time this text was written.  On the north coast of the Dingle Penninsula, County Kerry, Mount Brandon is almost 1000 meters high, and is one of the highest mountains in Ireland.

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