I’m certain that Joseph Sunlin was a Mason.
Grand Lodge of Minnesota proceedings, 1900
Under Mortuary Roll, records death of Joseph Sunlin as January 18, 1899
Minneapolis Lodge No. 19
Under Roster of Members (1891)
813 Sunlin, Joseph (d) 1899
In Google books:
Transactions of the Grand Lodge of Free and Accepted Masons of the State of Michigan (1906)
Under “Donations and Other Courtesies”
“Mrs. Joseph Sunlin a large picture for the parlor. ”
I’d like to get a look at that picture, whatever it was.