Artist: Portishead
Song: "Mourning Air"
Album: Portishead (1997)
Tabbed by:  Seduction Jones, EGR, Michigan (Esquire223@hotmail.com)

Song starts out w/ singing and some weird thing in the background.
Then the bass starts along w/ everything else:

G:        7 8   7         7 8   7
D:
A:
E: 8    8         8     8

...and it continues on this pattern, but then changes to this 
(Note: (s) refers to a slide):

G:           12  13
D:
A:
E: 2 (s) 13          13 (s) 2
(x2)

G:          15  16
D:
A:
E: 2 (s) 16         16 (s) 2
(x2)

E: 7 (let it ring)  8  7  10 (s) 7  (x2)

Well, that's really about it.  If you want it to sound like it does 
in the song, you need to do
three things:

1. Play it on a fretless.
2. Boost you bass knob as long as you have a good amp.
3. Play it just like I say you should.

GO PLAY