One member of English group "The Yetties" (can't remember which one) is particularly adept at playing the bowed psaltery,and I remember him playing,at the theatre where I worked,one December, "Have Yourself a Merry Little Christmas"----Stunning !!
          If you want to hear Irish / Scottish (Celtic) music played on harmonica,find Brendan Power on You-Tube, and be amazed !! I can even play some myself,although I am playing mostly "Morris" tunes at the moment (with any side who'll put up with me !!).