"The Brown Bear of the Green Glen" is a Scottish fairy tale collected by John Francis Campbell in Popular Tales of the West Highlands, listing his informant as John MacDonald, a "Traveling Tinker".
He told John that an eagle would eat it, and he was to cut the wart from its ear without drawing a drop of blood.
There, he got the water, and also a whiskey bottle that never emptied, a loaf that grew no smaller when slices were cut off, and a cheese that was the same; he also kissed a sleeping beautiful woman.
He met his brothers in the town and told them to come home, but they set on him to kill him and stole the water.
The tale was also collected by Francis Hindes Groome, who noted that it was a variant of The King of England and his Three Sons.
[3] Both tales are classified in the international Aarne-Thompson-Uther Index as type ATU 551, "The Sons on a Quest for a Wonderful Remedy for their father" or "Water of Life".
This tale type concerns a king that is dying or going blind, and sends his three sons to find the only thing that can cure him.