Thanks for the kind words, everyone.
My bad! Not a single accidental in that Benjamin Britten song! What a jewel of a find. Thank you.
Marvelous! I have one of those cardboard dulcimers and I love it too. It's fun to sit in the sun and not worry about a wooden one melting the glue. And so light and handy to carry around! I immediately recognized what it was by the sound.
You may have some trouble with the Benjamin Britten chords on a diatonic dulcimer, but I'd still play it with the notes I could find.
Welcome to the site.
Nicely done! Wishing you good health & great joy in this new year!