Brothers Grave
So it came to pass that Diancecht having heard of Miach's deeds in restoring King Nuada's hand of flesh and blood became enraged with jealousy of his son surpassing him in the skills of the healing arts. This jealousy so consumed him that he came to the place where Airmid and Miach were staying and murdered his son. Airmid was filled with great sorrow over her brother's death.
On a vigil to Miach's grave Airmid noticed a varying of grasses that had feed upon the flesh of her wise brother. She begins to study and catalogue them by their use arranging them on her cloak. When she had finally identified all 365 plants she relaxed in triumph knowing that with this knowledge one could live forever. She did not notice her father's approach still filled with jealousy Diancecht over turns the cloak spreading the grasses across the land, the knowledge becoming lost since that time.