Analysis of The Death Of Regret

I opened my shutter at sunrise,
And looked at the hill hard by,
And I heartily grieved for the comrade
Who wandered up there to die.

I let in the morn on the morrow,
And failed not to think of him then,
As he trod up that rise in the twilight,
And never came down again.

I undid the shutter a week thence,
But not until after I'd turned
Did I call back his last departure
By the upland there discerned.

Uncovering the casement long later,
I bent to my toil till the gray,
When I said to myself, 'Ah - what ails me,
To forget him all the day!'

As daily I flung back the shutter
In the same blank bald routine,
He scarcely once rose to remembrance
Through a month of my facing the scene.

And ah, seldom now do I ponder
At the window as heretofore
On the long valued one who died yonder,
And wastes by the sycamore.