It has just occurred to me that when you said, "Great-Grandma Jessie" that perhaps you meant Jessie (Baum) Burnett, Charles Burnett's wife. If so, I should perhaps mention that I haven't had contact before with any of that branch, and am also interested in information on the "Osseo Burnetts" (William, his son Charles, and their descendants). I know that Charles had daughters named Vera (may have married a Kint Froehlich?) and Nina Comar, but I know very little more than that.
I look forward to hearing more from you.
Stephen Fuller