I have heard this song several times by various singers, including the late Willie Clark who performed at many Bothy Ballad Festivals throughout the N.E. corner of Scotland. My own father used to sing it from time to time and he always believed i to refer to the bleaching fields associated with the Calloco Print Works situated alongside the Blane Water (R. Blane) in Strathblane, Stirlingshire, Scotland. For further info I suggest www.strathblanefield.org or google Braes of Strathblane. I am familiar with the Braes of Strathblane, where I played as a laddie, although the print works was demolished before I was born. However, several of my school pals lived in the workers houses, which were not pulled down until well after the coronation.