The Story of Inga - mother of a birkebeiner king
by Rolf Kjærnsli

On a Christmas day in the year 1205 A.D. a strange party came to the hamlet of Lillehammer. They were heading north, moving stealthily and often at night. There was a woman in the party and a baby child, of whom they took great care.
The party put up at a small farmhouse and stayed there over Christmas, hardly venturing out in daytime. The woman enjoyed a few days of rest, giving her a chance to attend to her eighteen months old son. She was Inga from Varteig, a small community in south-eastern Norway, and the child was begotten by the late king Håkon Sverresson, who had died before the child was born.