From the sleevenotes to My Roots Are Showing:

6.  The Shakin's o' The Pocky
This slow air, which was composed by James Scott Skinner, has been a longtime favorite of Natalie's uncle, Buddy MacMaster.  It is found as a slow strathspey in "The Skye Collection".

The original story about its composition may be seen through the link I gave above.  Two abc transcriptions may be found through  JC's Tunefinder:

The Shakin's o' the Pocky  One was made by Nigel Gatherer from Aly Bain's playing of the tune, the other is a transcription by Richard Robinson from Skinner's published music.  Due to a peculiarity of coding, the midi option for the latter does not play all the way through.

Malcolm