Contact the Dabury Public Library. They will have newspapers on microfilm and will find the death notice, if they were published. There will be a fee charge but it will be well worth it, especially if you live out of town. You can also request the death notices from Town Clerk office in Danbury, I think they are still charging $5 per certificate. When and if you get the death notices, contact the cemetery and find out if any other related person is buried in the same plot area. Sometimes you may other relatives that you were not aware of. Hope this helps and good luck in your research.