History of the Saint Croix Valley was published in 1909; Olena Larson died in 1911.
From History of the Saint Croix Valley (ARC F 587 .S14 E3 1909 v. 2 in the UWRF Archives)
Lars Larson (Jr.) was born in Norway, October 14, 1851, and came to the United States with his parents, Lars (Sr.) and Olena Larson when two and a half years old. Mr. Larson, Sr., was a farmer inNorway and settled on Rush River in the township of Martell, Pierce county, Wisconsin, about 1853 or 1854. Here he purchased 120 acres of wild land from the government, which he cleared and brought under cultivation. Here he made his home until the breaking out of the Civil war, when he enlisted January 4, 1862, in Company G, Fifteenth Wisconsin Volunteer Infantry, and served six months, when he was discharged for disability. He returned to his farm in Pierce county and lived there until his deaht April 5, 1865, aged forty-six. His widow is still living and resides with (Lars Jr.) at the age of eighty-seven years. She was born June 25th, 1821, and is the mother of nine children, five of whom are still living. …
The Civil War and Northwest Wisconsin 