"Logan Water",in Gaelic "Uisge Logain", also known as "Lausin Water" and "Logan Braes" is an Irish/Scottish slow air or march.
The tune appears in the McLean Collection (1772), James Oswald's The Caledonian Pocket Companion vol. 5 (1760), McGibbon's Scots Tunes, Book 1 (c. 1762) and O'Neill's Music of Ireland: 1850 Melodies (1903).
According to The Scottish Gazetteer: "A stream in Eskdale, Dumfries and Galloway (south-west Scotland), the Logan Water rises in the hills to the south of the River Esk. It flows generally southwards to join the Wauchope Water which flows into the Esk."
It has been recorded by Aly Bain & Phil Cunningham on The Ruby and by others.
I learned this from The Ruby recording.
I play this in a medley with "Crossing to Ireland" in this section.