Duna was recorded by baritone Reinald Werrenrath in the acoustic era for Victor Talking Machine Company, and re-recorded superbly (catalog number Victor 1280-B) by the same baritone in 1927 during the electrical era. The 1927 version is one of the most haunting vocals you will ever hear. The 78rpm record regularly comes up on eBay. If anyone knows Hamilton Camp, perhaps they might let him know.