Well, in my handy dandy book of Civil War Songs the chords are as follows:

           A
  We shall meet but we shall miss him,
                E7
  there will be one vacant chair,
               A             D
  We shall linger to car-ess him
            E7                  A
  While we breathe our evening pray'r;
  
         E      B7     E
  When a year a-go we gathered,
          B7               E
  joy was in his mild blue eye
         B7             E
  But a golden chord is severed,
           B7            E
  and our hopes in ruin lie. 
  

We shall meet but we shall miss him,
there will be one vacant chair,
we shall linger to caress him,
when we breathe our evening pray'r

At our fireside, sad and lonely,
Often will the bosom swell
At remembrance of the story,
how our noble Willie fell:

how he strove to bear our banner
Through the thickest of the fight
and uphold our country's honor,
In the strength of manhood's night.

True, they tell us wreaths of glory
Ever more will deck his brow,
But this soothes the anguish only,
Sweeping o'er our heartstrings now

Sleep today, oh early fallen,
In thy green and narrow bed,
Dirges from the pine and cypress
Mingle with the tears we shed

Chorus again.

Do you have the melody?

Margarita