From Oswald's 'Caledonian Pocket Companion', both tunes, bk. 5, p. 31, c 1753. The second (a version of "I'll never love thee more/ Montrose Lynes") seems to me to be more likely to be "The Isle of Kell" than the first. [Reduce # after Q: to slow it down]

X:1
T:Hardie Knute
S:Oswald's CPC, bk 5, c 1753
Q:120
L:1/4
M:3/4
K:Bm
BBd3/4e/4|{e/}fa e3/4d/4|Bee3/4d/4|B3:|(d/{A/B/}d) {c/}A3/4F/4|\
{E/}FAE3/4D/4|EE{E/}F3/4A/4|B3:|]

X:2
T:Chevy Chace
S:Oswald's CPC, bk 5, c 1753
Q:120
L:1/4
M:3/4
K:Amixolydian
A|A3/4B/4dd|e3/4f/4A3/2a/2|a/(g/4f/4) {f/}e3/2d/|B2z/A/|\
A/B/dd|e3/4f/4A3/2a/|a/f/ (ef3/4)a/4|A2|]