This alphabet, although similar to ours and with fewer letters, contained extra purpose. Each of its nineteen letters references a tree, and each tree much natural lore, medicinal fact, useful aids and more. Used long before computers, when mnemonics played a key role, each tree letter is therefore a starting point for referencing data in multiple ways.
Connecting memory to time through tree letters that define the
yearly cycle plays a key role here.
Each of its thirteen consonants corresponds to a 28 day sidereal, or lunar period that follow an anti-clockwise
direction, while the five vowels follow a solar (sun-wise) direction
to track solstice and equinox points. In addition, one hidden letter tracks the nineteen year metonic point when
solar and lunar cycles re-calibrate in a lunar standstill.
(more on this lunar standstill event here).
Each of these nineteen letters has a poem by aonghas macneacail, together with graphics by simon fraser