Ogam, Ogham u Ogum, hidden from the Druids and bards Celtic since some centuries before our era and language unknown to the vulgar, whose writing was not known until the beginning of the middle ages in the menhirs of Ireland and Scotland that are still concerning. Its alphabet, known as Ogham alphabet or alphabet of trees, because each letter name of tree in old Irish, also called the betluisnion as their first letters are the B, Luis (Rowan) and Beth (birch), L, N, Nyon (Fres No). The betluisnion alphabet.
