There are both Boehlke and Boelke spellings found in Milwaukee's locally published German newspapers. I don't find direct matches to your posting in the ongoing indexing project from these papers.
"Milwaukee's German Newspapers; an index of death notices and related items" (1844-1950).
For more specific information contact:
Gary Rebholz, compiler/editor
Indexing Milwaukee's German newspapers continuously since 2007... helping to access our historic German-American culture.