This is the bit played at the beginning of the track.
Warren plays it on Violin (though he picks it as if it were a guitar/mandolin).
I worked it out on Mandolin, and it sounds very similar. Violin and Mandolin tuning are
E-A-D-G. Have a go at playing on guitar, not sure how it sounds!
E|---------------------------------------------------------------|
A|---------------------------------------------------------------|
D|----10----12----14----12----10---------7-----------------------|
G|-----------------------------------------9---- --9------ X 1-|
[ Tab from: http://www.guitaretab.com/d/dirty-three/346930.html ]
E|---------------------------------------------------------------|
A|---------------------------------------------------------------|
D|----7----10----12----14----12----10---------7------------------|
G|---------------------------------------------9---------9-------| X2
E|----------------------------------------------------------------------|
A|----------------------------------------------------------------------|
D|----------------------------------------------------------------------|
G|----9----12----14----12----14----12----14----9----14----9-------------| X1