Non-monumental Uses
As well as its use for monumental inscriptions, the evidence from early Irish sagas and legends indicates that ogham was used for short messages on wood or metal, either to relay messages or to denote ownership of the object inscribed. Some of these messages seem to have been cryptic in nature and some were also for magical purposes. In addition, there is evidence from sources such as In Lebor Ogaim, or the Ogham Tract, that ogham may have been used to keep records or lists, such as genealogies and numerical tallies of property and business transactions. There is also evidence that ogham may have been used as a system of finger or hand signals.
In later centuries when ogham ceased to be used as a practical alphabet, it retained its place in the learning of Gaelic scholars and poets as the basis of grammar and the rules of poetry. Indeed, until modern times the Latin alphabet in Gaelic continued to be taught using letter names borrowed from the Beith-Luis-Nin, along with the Medieval association of each letter with a different tree.
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