Almost exactly a dozen years ago on another thread, Jim McLean observed that

"The Hawk that Swoops on High (by Pipe Major J MacKay) also goes by the Gaelic title 'Creag Ghuanach', the 'Nodding Stone' and is, as lighter says, the same melody as the Mingulay Boat Song. I've played it many times."

On the same thread, George Seto gives the words to the sixteenth- century poem "Creag Guanach" by Donald McDonald:

http://mudcat.org/thread.cfm?threadid=10414

It seems to me that the pipe tune would have to be adjusted (just a little) to fit the Gaelic words. So it would seem that the Mingulay *tune* was not called "Creag Guanach" except by the very few who were aware that the Gaelic words had been set to it and unaware that it was composed (as "The Hawk that Swoops on High") by Pipe Major MacKay.
(Sometimes it's given as "Creag Ghuanach" - don't know which is correct.)

Does anyone know when MacKay wrote "The Hawk That Swoops on High"? Or know anything about him? "The Hawk" was in print in 1936 as part of the pipe repertoire of the Seaforth Highlanders, shortly before Roberton wrote "Mingulay."

"The Hawk that Swoops on High" is not quite identical to "Mingulay" – and, IMO, not quite so good. The tunes are, however, essentially the same.

(PS: Have just heard a commercial recording of Mingulay that contains the lines, "What care we/ Though fighting inches?")