Benjamin Christianson (1862-1917) - Thief R. F. MN

Dear Listers! Bernt Christianson Gilberg aka Ben/Benjamin Christianson was born in Faaberg Co., Gudbrandsdalen, Norway Oct. 14, 1862. He emigrated in 1882 and married at Alma, Buffalo Co., WI on Mar. 10, 1889 to Mary Jensen, nee Urness, born in Hafslo Co., Sogn, Norway May 15, 1853, emigrating in 1862 to Wanamingo, Goodhue Co., MN. Her 1st husband Paul Jensen was a merchant at Red Wing, Goodhue Co., MN but they divorced, and Mary moved to Mondovi, Buffalo Co., WI. Benjamin was for several years a store clerk, first in Mondovi, Buffalo Co., WI and later at Boyd, Chippewa Co., WI, but in 1900 the couple moved to Thief River Falls, Pennington Co., MN where we find Ben in 1905 as a merchant. In 1910 he is recorded as «living from own income», but the 1911 city directory lists him as a «deputy Register of Deeds». What then happened I don’t know! Benjamin Christianson is buried in the Oak Park cemetery at Mondovi, WI - having died in 1917, but I am unable to locate a death record for him neither in MN nor in WI! His wife Mary is said to have moved in 1920 to Minneapolis, MN where she died May 2, 1935. She had one son who was from her 1st marriage. Having been a merchant and later a deputy Register of Deeds I presume there should be some documentation about him in Thief River Falls, MN. Maybe the local newspapers might have something on him - maybe an obituary or a notice of where he and Mary may have moved…? I would be very happy if someone can please help me locate further information about the destiny of Benjamin Christianson. Thanks a million in advance! Very sincerely yours,