I'm not an expert at white mensueral notation - so this is "best guess" - using one interpretation I found on the web it seemed very slow - so I doubled the speed (easier then halving all the notes)

X:1
T:In Greenwood lived stout Robin
Q:1/4=240
I:abc2nwc
M:6/4
L:1/8
K:C
z6G2d2d2|d4B2(e3d) c2|B4d2A4c2|G4B2A2A2z2|c4c4c4|
w:In Sher-wood lived stout Rob-in Hood an arch-er great, none great-er His bow and
f4c2A4B2|c4e2(d3c) B2|c2A4G2G2z2|B2B2^c2d4G2|^F3E D2F4G2|A4z2f2e2d2|
w:shafts were sure and good, yet Cup-id's were much be-tter Rob-in could shoot at man-y a hart and misse, Cup-id at
c2d4e4f2|e4e2d6|z6A3B ^c2|d2D2z2z6|d3e f2g2G2z2|B3c d2c2B4|
w:first could hit a hart of his,Hey Jol-ly Rob-in, Ho Jol-ly Rob-in, Hey Jol-ly Ro-bin
A4z2e2d2c2|B4G2B4c2|d6z2z2B2|d2B2G2z2z2B2|d2B2G2z2z2B2|
w:Hood Love finds out me as well as thee to fol-low me to
e2c2A2z2z2e2|d3c B2A3G A2|G6z6
fol-low me, to fol-low me to fol-low me to the green wood.