Back in 1954 I was stationed in Wash, DC and had the run of the hobby shop at Walter Reed Army Hosp. I became interested in building a Dulcimore having heard JJN on a LP record. Went to the library of Congress or the Smithsonian [dont remember which] and asked the lady at the desk if they had any information on the App.Dulcimer. In return she said what are they, My answer was that thing hanging on the wall behind you. Enough said.
I finally got the address of JJN and wrote him about his instrument His reply was that he used the body of an instrument in the Violin family and added the fret board and the tuning head. [Something bigger than a Viola and smaller than a chelo]. Somewhere in the Attic I have the letter complete with the tuning and how it was strung but It would take me days to find it Allan