Thank you very much for your reply. What a mystery.
The photos *have* to be of family, but it makes no sense at all that My Flemish relatives would have spoken, let alone written Norwegian. You say it is old fashioned Norwegian... can you tell by the phrasing/spelling if the writing is what I would think of as 'school book perfect'? Or could it have been something they learned at home with a dedicated parent/more casual?