As imperceptibly as grief

As imperceptibly as Grief
The Summer lapsed away -
Too imperceptible at last
To feel like Perfidy -

A Quietness distilled
As Twilight long begun
Or Nature spending with herself
Sequestered Afternoon.

The Dusk drew earlier in
The Morning foreign shone
A Courteous yet harrowing grace
As Guest that would be gone

And thus without a Wing
Or service of a keel
Our Summer made her light escape
Into the Beautiful.