I wish I had found this poem before the bank holiday! This is taken from Bright Star: The complete poems and selected letters.

'To one that has been long in the city pent'

To one that has been long in the city pent,
'Tis very sweet to look into the fair
And open face of heaven, - to breathe a prayer
Full in the smile of the blue firmament. 
Who is more happy, when, with heart's content,
Fatigued he sinks into some pleasant lair
Of wavy grass, and reads a debonair
And gentle tale of love and languishment? 
Returning home at evening, with an ear
Catching the notes of Philomel, - an eye
Watching the sailing cloudlet's bright career,
He mourns that day so soon has glided by,
E'en like the passage of an angels tear
That falls through the clear ether silently.