A few listenings to Giok's UTube link stirred some old memories and I have managed to cobble together a version of the tune. It is in abc format at the end of this post.

Given I have not heard it in over 40 years (that frightens me) I am sure there are mistakes. Please tell me of any corrections I need to make.

X:1
T:Waters of Kylesku, The
M:3/4
R:Waltz
L:1/4
Q:180
K:G
d|B2 A|G2 B|d2 d|B2 d|g2 g|f2 e|d3-|d2 d|
d2 d|e2 d|d2 B|G2 B|d2 d|c2 B|A3-|A2 d|
B2 A|G2 B|d2 d|B2 d|g2 g|f2 e|d3-|d2 d|
d2 d|e2 d|d2 B|G2 A|B/2 d/2-d2|B2 A|G3-|G2||