[1] על פי המיתולוגיה הקלטית והאירית עץ האילסר מקודש לחוכמה\תבונה. ומה שיהיה ברור במובלע לקורא האירי לא יהיה מובן לקורא הישראלי בתרגום ועל כן הוספתי את המילה "תבונה" כדי שהפואנטה תהיה ברורה (על פי הבנתי את היצירה הזו).

. William Butler Yeats (1865-1939) was born in Dublin.

Since mediaeval times trees have been considered sacred.  In Ireland in particular three trees gained special prominence, the Apple tree for its beauty, the Hazel for its wisdom and the Oak for its strength.  Indeed so sacred were these trees regarded that any unjustified felling of an Apple, Hazel or Oak tree, was a crime worthy of the death penalty.  The wood of these trees was also used to construct funeral pyres, at which times particular respect seems to have been paid to the Hazel in relation to its wisdom.  Hazel-wands have often been found in the coffins of notable personalities, for among the chiefs and rulers of ancient times, a wand of Hazel was considered a symbol of authority and wisdom.

http://www.controverscial.com/Hazel.htm