Thomas Brown in the 1910 US Census lives at 1051 Washington St. Boston, MA. He is a widower and is a joiner in a carpentry shop.
I checked the 1910-1911 Boston City Directories and I don't seem to locate him there.
MA BMD are online to 1915 and your Thomas does not appear to be listed. 1916 - 1920 are online, but not indexed on www.familysearch.org
Way too many Thomas' in the newspaper between 1910 and 1922 to even make a determination.
My recommendation would be the MA Archives to check the index for him for 1916 to 1922. If he died in 1921-22 his record would be located at the MA Registry of Vital Records in Boston.
Once you have his date of death it should be easy to get his obit.
I realize you are in WI and probably can't go to the MA Archives or MA RVR.