John This is a fascinating business, with successive waves of musical exchange in the 18th, 19th and 20th centuries. I've collected a number of the old manuscripts on www.piob.info. These include not just the Rook manuscript, which Richard and Anita Evans scanned, but a recent addition in the form of the Millar manuscript. The first part of this consists of tunes for the Northumbrian pipes while the rest of it is mostly for the union pipes (Robert Millar was given a Robert Reid set of union pipes when he retired as an army piper at the age of 40).
It's often possible to track tunes moving back and forth across the Irish sea. For example, 'Jacky Latin' was composed near Dublin in the early 1700s, turned up in the 1733 Dixon manuscript, then again in O'Farrell in Dublin in 1804. It emergesd in its "modern" Northumbrian form thanks (if memory serves) to the Cloughs, and has since got back int the Irish repertoire again thanks to Jimmy O'Brien-Moran. Ross To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
