This tune is named after Calum Johnston who was a piper, folklorist and Gaelic singer. He and his sister Annie were significant sources during the movement by the likes of Hamish Henderson to record the tradition.
Composition credits have been given to Roddy Campbell, himself a piper and singer as well as a relative of Calum and Annie Johnston.
The setting posted is taken from the Daimh album Diversions. There is a tune of the same name said to be in P/M Willie Ross’ collection but I don’t have the book so can’t say if they are the same tune.
Fred Morrison recorded the tune on low whistle on his Up South album. Fred used the range of the whistle to the advantage of the tune. Here is a rough transcription.
C:Roddy Campbell/Arr. Fred Morrison
|:dB|AAAB AAAB|GGGA B2EG|AAAB A2AB|egBd e2:|
zA|Beef ggge|dBGA B2GB|Beef gggf|feed e2zA|
Beef ggge|dBGA B2e/f/g|aaab gffe|edBd a3z|]
|:GAA<A EAAB|BGGA B2EG|GAA<A EAAB|eAAB [1e2dB [2e2z:|
B|edef gBGB|dBGB B<BGB|edef gBGB|eAAB e2dB|
edef gBGB|dBGB B<BB2e/f/g|a2zb gffe|edB/c/d e3z|]