In ancient times, our Celtic Druid Ancestors devised a system, part alphabet, part calendar/zodiac, to be carved using simple notches onto wood or stone. Each character was a number and a letter. The consonants were time periods – mostly lunar months and the vowels were the solstices or equinoxes. Each symbol represented a tree or shrub, around which grew an extensive mythology, recording historical and religious stories, the uses of each tree both for craftwork and medicinally, and a divinatory system similar to the tarot. To the Celts, the whole landscape was alive with meaning, and wisdom – the wisdom of the trees.
Hazel, Ogham name Coll, rules 5th August to 1st September. Around Connla's well grew the nine Hazel trees which contained all the knowledge of the world. From those trees dropped nine nuts, which imparted this knowledge to the salmon living in the well who ate them. Fionn cooked the salmon for the chief Druid to eat, but burnt his thumb on the cooking fish and sucked it to ease the pain, gaining the wisdom instead of his master.