The Book of Dreams and Ghosts

"Thorhall sent to the next farm for the men there, and told them what had taken place. All thought highly of the exploit that heard of it, and it was the common talk that in all Iceland there was no man like Grettir Asnundarson for strength and courage and all kinds of bodily feats. Thorhall gave him a good horse when he went away, as well as a fine suit of clothes, for the ones he had been wearing were all torn to pieces. The two then parted with the utmost friendship. "Thence Grettir rode to the Ridge in Water-dale, where his kinsman Thorvald received him heartily, and asked closely concerning his encounter with Glam. Grettir told him how he had fared, and said that his strength was never put to harder proof, so long did the struggle between them last. Thorvald bade him be quiet and gentle in his conduct, and things would go well with him, otherwise his troubles would be many. Grettir answered that his temper was not improved; he was more easily roused than ever, and less able to bear opposition. In this, too, he felt a great change, that he had become so much afraid of the dark that he dared not go anywhere alone after night began to fall, for then he saw phantoms and monsters of every kind. So it has become a saying ever since then, when folk see things very different from what they are, that Glam lends them his eyes, or gives them glam-sight.