This is a majestic poem Sally telling of the depths contained in nature and in human artifice and how easily the panoply of creation is wrecked by human greed. As GM Hopkins SJ remarked in 'Binsey Poplars':

.

O if we but knew what we do

When we delve or hew —

Hack and rack the growing green!

Since country is so tender

To touch, her being só slender,

That, like this sleek and seeing ball

But a prick will make no eye at all,

Where we, even where we mean

To mend her we end her,