I thought you might like to see the article about a divorce between Mary Brannan and Albert Brannan, in case it is your Mary:
The Oregonian June 25, 1899 page 10
CLARK COUNTY COURT
Wife of an Oregon Bigamist Sues for Divorce.
Mary Brannan has begun suit for a divorce from Alber Brannan. She alleges that Brannan married Elizabeth McDonough at Astoria, Or.,and that on May 24, 1899, he was convicted of bigamy and sentenced to two years in the penitentiary at Salem.