Jon ~~ I tried it, just for myself, to Immortal Invisible, & it does indeed sound v nice. However, as I never tire of saying, any song in Common/Ballad metre [which so many of them are] can in effect be sung to the tune of any other, and the tune attributed to each is largely a matter of convention.

And once start down THAT road!...

Best regards

~Michael~

Just e.g. tried singing The Little Musgrave And Lady Barnard to tune of O Worship The King All Glorious Above. Wowie! Try it...