Today is Tartan Day in North America. (In Australia, it’s July 1.) Here’s a medley of melodies that were once Scottish: “The Piper’s Weird,” “Bonnie Thackit Hoosie,” “Marnock’s Strathspey” and “Mackenzie Highlanders.” I don’t have a good set of bagpipes on my computer, so I had to make do with other virtual instruments. That may or may not disappoint you. The first two tunes are from James Scott Skinner’s collection The Harp and Claymore. Skinner uses “weird” here in the sense of “destiny” or “fate,” though the more common meaning may also apply.