There are a few tabs of the Peter, Paul, and Mary version of this song,
which is somewhat different than the original. So this is my attempt to
write out the chords from Pete Seeger's version, based on a live recording
from The Essential Pete Seeger (the studio version is played on banjo). 
Feel free to comment with suggested corrections, as I know it isn't exactly 
correct.



Capo I


             
If I had a ham

      
mer,
             
I'd hammer in 

    
the morning

I'd hammer in 

the evening,
            
All over this 


land.
             
I'd hammer out

         
 danger,
             
I'd hammer out

           
 a warning,
            
I'd hammer out

             
 love between 

             
my brothers an

     
d my sisters,
           
A - aa -all ov

        
er this land.


             
If I had a bel

    
l,
             
I'd ring it in

     
 the morning,

I'd ring it in

 the evening,
            
All over this 


land.
            
I'd ring out d

         
anger,
             
I'd ring out a

        
 warning
           
I'd ring out l

              
ove between my

             
 brothers and 

   
my sisters,
           
A - aa -all ov

        
er this land.


             
If I had a son

   
g,
             
I'd sing it in

     
 the morning,
           
I'd sing it in

 the evening,
            
All over this 


land.
            
I'd sing out d

       
anger,
             
I'd sing out a

        
 warning
           
I'd sing out l

              
ove between my

             
 brothers and 

   
my sisters,
           
A - aa -all ov

        
er this land.


             
Well I got a h

        
ammer,
           
And I got a be

ll,

And I got a so

ng to sing, 
            
All over this 


land.
             
It's the hamme

              
r of Justice,
             
It's the bell 

           
of Freedom,
            
It's the song 

             
about Love bet

             
ween my brothe

          
rs and my sist

ers,
           
A - aa -all ov

        
er this land.


             
It's the hamme

              
r of Justice,
             
It's the bell 

           
of Freedom,
            
It's the song 

             
about Love bet

             
ween my brothe

          
rs and my sist

ers,
           
A - aa -all ov

        
er this land.