For the past three years I've been using an antique Hungarian Citera, unique among the diatonic European Board Zithers (i.e the Langeleik / Epinette / Appalachian dulcimer type) in having a second row of frets for the missing notes of the scale. This is a curious solution to a particular problem which introduces different modal possibilities without compromising the essential purity of the diatonic / Phythagorean scale. In many of these diatonic board zithers, the Swedish Hummel in particular, the melodies are traditionally played by harmonising in thirds against the open drone strings, an approach which certainly suits the citera, be it traditionally or else in the accompaniment of Traditional English Folk Song...