Mathilda Thompson Gilbertson

Dear All, I am searching for information on Mathilda Thompson. I believe that she emigrated from Norway in 1870 with her parents Oslat and Christine Thompson. Mathilda married Louis Gilbertson (Laurits Gulbrandsen, you folks helped me find his family in the thread "farm name Knain") in Minnesota in 1878, according to the census) and they had five children. My family has a rosmaled trunk that supposedly was brought over by Mathilda, as well as a spinning wheel that (again supposedly) belonged to her sister. The spinning wheel is identical to one that we saw in the Vesterheim museum. Tova, the curator of the Vesterheim, told us that their wheel had come from Stavanger. Our spinning wheel has "HOSM" burned into it. Tova says that this means the name of the maker of the wheel had a first name starting with H, "O" was for the Father, "S" meant he was a son, and the farm name started with "M". We believe they may have emigrated from Christiana, and the trunk (if it was hers) also had writing on it. "Tory" or " Torey" Datter. Any help or ideas will be greatly appreciated! Sue