I used Barfly to write it!

The reason why it doesn't work is because of Mudcat. I put <pre> tags around the tune, but instead of treating it as preformatted, Mudcat added leading spaces. Also when you copy it from here, most of my spaces have been transformed into ASCII character \0xCA, whatever that is. This happens regardless of whether I use <pre> tags or post it raw (I just checked).

This is horrible. Can't we post ABC with spaces?

Meanwhile, if you remove one leading space from each line, BarFly will play the thing but complains about bad characters.

The tune reminds me of Henry Reed's "Cold Frosty Morning", "The Wheelbarrow", "The Fine Old Man versus Gladstone's Hornpipe", and "King of the Fairies". "The Wheelbarrow", the one I play most often, is in turn something like a GM hybrid of "Gilderoy" and "The Princess Royal". The Gladstone tune (a Tory campaign tune from his election campaign of 1880) is the least known but my favourite.