I just came across a (new?) arrangement of The Swan for lever harp: http://www.mtnstreamsmusic.com/SheetMusicArtandWritings.htm
This is already in the key of G, so I guess it could be played as written to accompany the original cello part? From the preview (had to refresh the page to see it), it looks more difficult than “Essence of the Swan” though. With this (new?) arrangement, it seems like both right and left hand are equally playing the harmony, whereas if one plays “Essence of the Swan” with a cello, the cello would actually play the melody (top line) and the harp the harmony (bottom line) with the left hand, and instead of playing the top line with the right hand, the harp would play the indicated chords with the right hand in “Essence of the Swan”? I’m still not at a skill level to play these on my own just yet (but will be very soon) and couldn’t find any lever harp videos of The Swan either, hence my asking. Thanks!!!