Well, I think I know who your family is :-) Here's part of a message I got this morning:
*** Your family at page 205, Rise Sogns Gårde, is not related to the Jens Albertsen b. july 6, 1879, son of Lars and Mattie Albertsen. In fact that Albertsen family had several members that went to Iowa. Jens Albertsen had two brothers, Hans and Albert Larsen Albertsen and a sister called Marie. All three brothers went to Iowa and settled around Kimballton. But sorry - not a connection to your family.
Well, it's one form of progress - ruling things out :-) Hope it helps with your own research.