There is a death notice in the Baldwin Bulletin, but not much information:
Baldwin Bulletin - The wife of Mr. Torschner of Warren, was buried last Friday from the Catholic church - March 29, 1889 issue.
There was no Hammond or Roberts newspaper at that time. You could check the Hudson, River Falls and New Richmond papers, but these are supposed to be indexed (They all report Roberts and Warren news sporadically at that time. This does not mean those who indexed these papers could have missed something. Great Aunt Gert may also know something.
Pierce County Historical Association