Charles Morris, Historic Tales: The Romance of Reality…
“ When he was a few months old a man named Unas came from Norway to the islands, a smith or comb-maker by profession. But Gunhild suspected him of being a spy sent by King Sigurd to kill her son, and she hid the boy in a cavern, which is still called Sverre's Cave. He acted like a spy, for he followed her to the cave, found where she had hidden the child, and threatened to kill it unless she would marry him. Gunhild had no love for this dangerous stranger, but she dearly loved her little son, and with much reluctance she consented to marry Unas to save the babe's life. ”
