From a live Cape Breton concert. Hammer on the G< A in bars 2 and 6 of the first part to double the A on two strings, all you fiddlers.
A triplet (3GGd works well in bars 1 and 3 of the second part.
There are a few tunes which share characteristics with your "Miss Stewart", including "Miss Stewart’s Strathspey - Pittyvaich" by William Marshall, and "The Duchess’s Slipper" (attributed by some to Niel Gow). In Ken Perlman’s ‘Fiddle Music of Prince Edward Island (1996) there is a tune which matches "Miss Stewart" fairly closely. There it is called "The Duchess’ Slipper", but I think it’s misnamed. I’ll add that setting here.