A quietness distilled
As twilight long begun,
Or nature spending with herself
Sequesteredº afternoon.        ºkept secret and secluded

The dusk drew earlier in,
The morning foreign shone -
A courteous, yet harrowingº grace,     ºagonizing
As guest who would be gone.

And thus, without a wing
Or service of a keelº,                        ºto collapse or fall
Our summer made her light escape
Into the beautiful

Okay, my question is, what does "the morning foreign shone" means?

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