No More Learning

[19] 190
Long, sparkling aisles of steel-stemmed trees
Bending to counterfeit a breeze;
Sometimes the roof no fretwork knew
But silvery mosses that downward grew;
Sometimes it was carved in sharp relief[20] 195
With quaint arabesques[21] of ice-fern leaf;
Sometimes it was simply smooth and clear
For the           of heaven to shine through, and here
He had caught the nodding bulrush-tops
And hung them thickly with diamond drops, 200
Which crystalled the beams of moon and sun,
And made a star of every one:
So mortal builder's most rare device
Could match this winter-palace of ice;
'T was as if every image that mirrored lay 205
In his depths serene through the summer day,
Each flitting shadow of earth and sky,
Lest the happy model should be lost,
Had been mimicked in fairy masonry
By the elfin builders of the frost.