Here's the tune as Snuffy posted it in the missing tunes thread (though I've only copied the ABC, not the full MIDItext):

X: 223
T:On One April Morning
M:4/4
L:1/8
Q:96
S:June Tabor
N:filename [APRILAM
D:Aleyn, Topic TSCD490, 1997
K:G
D2|
G3G A2F2|(G2 A2) B2 e2 |d3B (BA)G2|B2A4 D2|
G3G A2F2|(G2 A2) B2 G2 |c3c (cd)e2|d4 z2GB|
d3d e3d | c2 B4 (GB)|d3B (BA)G2|B2A4 z2|
d4 e3d |(c>B-B2) G2 B2 |d3B A3 G|G6 ||