Right. Here's an attempt at an abc. I've never done one before, so I've made up my own conventions:
1. lower case letters are an octave higher than their upper case counterparts.
2. The line below the notes tries to give an indication of note length (with bar lines thus | in a slow 2/4). On this line, m = minim, c = crotchet, q = quaver, and c: = dotted crotchet. - before a note length indicates a tie.

                                                 Fare- |
                                                 A    |
                                                 c    |

well our | wives and | children_|___; our__ |
D    D   | E    D   | C-D D   |    F   g |
c:   q   | c:    q   | q q c   | -c q   q |

friends we must | bid a-| dieu_|___. For the |
a       a a    | g   F | E    |    F   G   |
c       q q    | c   c | m    | -c q   q   |

press | gang they_|___ have | press-ed__ | us_|___, for to |
a    | G E F    |    E    | D E   D C# | A |    A   G |
m    | q q c    | -c c    | q q   q q | m | -c q   q |

fight a | dar- ing | foe_|___
A    F | E    F E | D   |
c:    q | c    q q | m   | -c

Lines three and four are repeated.

Hope that helps!
Dave