I would like to add Lament For The Death Of Reverend Archie Beaton (John Mason) on Natalie MacMaster's No Boundaries CD on Warner Canada 15697, Rounder 7023, Greentrax 142, and no doubt other companies in other countries as well.If you punch up the Tunes link, go to Rev. Archie Beaton, track 13, and while you are there, sample some of of her other definitely non-dirge music!
Warner Canada has a full length version (but a bit crappy at 8kbs) somewhere in their Nat section It isn't working at the moment, so I could not find the exact url.
Anyway, Mr. Mason from the Orkneys has composed a beautiful, though mournful sounding piece, admirably rendered by Natalie. (I am assuming that it is the same John Mason who conducts the Scottish Fiddle Orchestra.)