Sometimes I do despatch my heart

SOMETIMES I do despatch my heart 
Among the graves to dwell apart : 
On some the tablets are erased, 
Some earthquake-tumbled, some defaced. 
And some that have forgotten lain 
A fall of tears makes green again ; 
And my brave heart can overtread 
Her brood of hopes, her infant dead. 
And pass with quickened footsteps by 
The headstone of hoar memory. 

Till she hath found 

One swelling mound 
With just her name writ and beloved; 
From that she cannot be removed.