Clarence Halls was the adopted son of John Halls and his sister Annie Halls. He lived in North Dakota until the late 20's or early 30's and then moved to Butte, Montana. At some point he met Jean Belgarde, and as far as I can tell, they married. I have found various references to both Clarence and Jean in both North Dakota and Montana newspapers.
A few days ago I found Clarence's death certificate on FamilySearch.org and while I found out a few things, he is listed as divorced (Surprise!), the informant was listed as Elizabeth Halls of Helena, Montana, and he died from TB. He was buried in Mountain View Cemetery, in Butte. Mostly the death certificate just left me with other questions.
Questions like, who was Elizabeth Halls? Why (and when) did he divorce Jean?
Sadly there comes a time when you either need to go to a place in person, or hire a researcher. I am fast approaching the point of hiring a researcher, or giving up.