Pretty Mary

Very simple. First, put your capo at the 4th fret. The only chords are D and G. Here's 
how the picking pattern goes:

Intro:    D                                  Verses: D
e|---2----------0------2-------------0-------2-------------0-----2----------|
B|--------3-------------------3---------------------3-------------------3---|
G|-----2----2------2------2------2------2--------2-----2-----2-------2----2-|
D|-------------------------------------------0-------------------0----------|
A|--------------------------------------------------------------------------|
E|--------------------------------------------------------------------------|
                                  G                  D
e|--0------2-------------0--------3---------0--------2----------0-----------|
B|-----------------3-------------------3------------------3-----------------|
G|----2---------2----2------2--------0---0----0---------2---2-----2---------|
D|---------0-----------------------------------------0----------------------|
A|--------------------------------------------------------------------------|
E|--------------------------------3-----------------------------------------|

There are some variations on this throughout the song. Listen to it closely to pick them 
out, but generally it deviates only slightly from this pattern.

D                       G                   D
My horses ain't hungry, they won't eat your hay
                           G         D
So fare thee well darling, I'm going away

D                               G           D
Your parents don't like me they say I'm too poor
                         G          D
They say I'm unworthy to enter your door

Pretty Mary, pretty Mary, would you think me unkind?
If I were to see you and tell you my mind?

My horses ain't hungry, they won't eat your hay
So fare thee well darling, I'm going away

As sure as the dewdrops fall on that green corn
Tonight I'll be with you, tomorrow I'm gone

My horses ain't hungry, they won't eat your hay
So fare thee well darling, I'm going away.

So fare thee well darling, I'm going away.