'Fisherman's Blues' is dotted with snippets of traditional Scottish and Irish tunes, including several written by the band which have since gone on to become part of the celtic repertoire as heard in informal music sessions round the world. Steve Wickham has prepared notation manuscripts of some of these and you can access them here:

Dunford's Fancy (jig)
Jimmy Hickey's Waltz
When Will We Be Married (jig aka 'Tenpenny Bit')
The River Road Reel (from 'When Ye Go Away')
Carolan's Welcome (slow air)
The Good Ship Sirius (jig)