The Ogham(pronounced ow-am) was the sacred alphabet used by the druids in ancient Celtic times. The alphabet was based on the kinship of the Celts with the trees; each letter in Ogham correlates to a certain tree. The language was used largely for divination(and still is by some pagan and Wicca groups). The tree that each letter was linked to had certain properties, which were used to foresee and clarify events, much like tarot cards.
Ogham was read vertically, reading the leftmost column first, from top to bottom, followed by the second column from the left, from top to bottom, and so on. In appearance, Ogham was a series of vertical lines, with horizontal or slanted lines emerging from one or two sides.