One day that winter, after Yule, Grettir went to Eyjardalsa and met Steinn, to whom he said:
"I see, priest, that you have little belief in what I say. Now I wish you to come with me to the river and see for yourself what probability there is in it."
The priest did so. When they reached the falls they saw a cave up under the rocks. The cliff was there so steep that no one could climb it, and it was nearly ten fathoms down to the water. They had a rope with them.
"It is quite impossible for any one to get down there," said the priest.
Grettir answered: "It is certainly possible; and men of high mettle are those who would feel themselves
happiest there. I want to see what there is back of the fall. Do you mind the rope."
The priest said he could do so if he chose. He drove a stake into the ground and laid stones against it.
Grettir now fastened a stone in a loop at the end of the rope, and lowered it from above into the water.
"How do you mean to go?" asked Steinn.
"I don't mean to be bound when I come into the fall," Grettir said. "So my mind tells me."