First Known when Lost

I never had noticed it until
'Twas gone, - the narrow copse
Where now the woodman lops
The last of the willows with his bill

It was not more than a hedge overgrown.
One meadow's breadth away
I passed it day by day.
Now the soil is bare as bone,

And black betwixt two meadows green,
Though fresh-cut fag got ends
Of hazel made some amends
With a gleam as if flowers they had been.

Strange it could have hidden so near!
And now I see as I look
That the small winding brook,
A tributary's tributary, rises there.