When and where was Ragnild Pedersdatter born? You have a good chance that her mother (and probably a wife of Peder) is listed on the birth/baptismal record.
Dovre is in Oppland, Norway and was frequently part of the larger district there of Lesja in Oppland.
Where did Peder Jorgensen die in 1857?
There is no nationwide index of these events -- a location within Norway has to be determined.