Information about Bernt Olsen (Dille)

My brother is planning a trip to Norway in early June and wants as much information as possible about our ancestor Bernt Olsen (Dille) who was born Nov. 18, 1839 and died September 15, 1911. We think he was married to Marit T Glarius Olsen who was born on January 4, 1848 and died May 1, 1892. My brother particularly wants to know where in Norway Marit and Bernt were born and raised.