The abc needs line breaks.Try this:
X:0 T:Parnell's March
Z:Anahata
D:Voice of the People: Reeling and Ranting, Taylor, Atkinson & Hutton
M:6/8
K:G
d2c | B2A B2c | d3 d2c | B2A B2c | d3 d2c |\
BAB GBd | edc BAG | A2d d^cd | A2d d^cd |
B2A B2c | d3 dBG | c2B c2e | g3 gfe |\
dBG DGB | c2A F2G | ABA G2F | G3 :|
|: g2f | e2c c2c | c2e f2e | d2B B2A | B3 B2c |\
d2d d^cd | edc BAG | A2d d^cd | A2d d^cd |
B2A B2c | d3 dBG | c2B c2e | g3 gfe |\
dBG DGB | c2A F2G | ABA G2F | G3 :|
NB
this is my first attempt at using the <BR> and other HTML stuff in a Mudcat posting. Hope it works. It occurs to me that I could stick a GIF or PNG on a web page and embed it in HTML here, so you'd see the actual music notation as a graphic embedded in the message which would be rather cool.