In this concluding part of The Golden Bough I have discussed the problem which gives its title to the whole work. If I am right, the Golden Bough over which the King of the Wood, Diana's priest at Aricia, kept watch and ward was no other than a branch of mistletoe growing on an oak within the sacred grove; and as the plucking of the bough was a necessary prelude to the slaughter of the priest, I have been led to institute a parallel between the King of the Wood at Nemi and the Norse god Balder, who was worshipped in a sacred grove beside the beautiful Sogne fiord of Norway and was said to have perished by a stroke of mistletoe, which alone of all things on earth or in heaven could wound him.