Extract from "Notes on Markings"

These pieces can be played on either pedal harp or Celtic harp fitted with semitone levers (minimum 34 strings, 6th-octave C to 1st-octave A). Lever changes are shown in the score, but where the pedalling is not difficult I have left it to harpists to write in as they choose. Otherwise pedal changes appear below the staves and lever changes between them. If you plan to use both types of harp, it might be helpful to circle the two markings in clearly contrasting colours, or else simply circle whichever one you need. On my own music I like to standardise by always using a green pen for levers and a red pen for pedals.