By that he knew that his brother had ceased to be.
"Then he began to weep.

For a whole day he wept, for two whole days he wept; then he cried aloud: 'O my mother, O my sweet mother, what didst thou leave thy son yet in the world?
Alas! now thou canst hear me no longer; and it is in vain that I stand above thy tomb, that I sob over the place of thine eyebrows, over the place of thy temples; it is in vain that I cry out my grief above thy dead forehead.' "The mother of Kullervo awakened in her tomb, and out of the depth of the dust she spake to him: 'I have left the dog Mastif, in order that thou mayst go with him to the chase.

Take therefore the faithful dog, and go with him into the wild forest, into the dark wilderness, even to the dwelling place, far away, of the blue-robed Virgins of the wood, and there thou wilt seek thy nourishment, thou wilt ask for the game that is necessary to thy existence.'" It was believed that there was a particular forest god, who protected the trees and the wild things of the wood.

The hunter could be successful in the chase only upon condition of obtaining his favour and permission to hunt.

This explains the reference to the abode of the forest god.