Analysis of Ebb-Tide

NOW the vexed clouds, wind-driven, spread wings of white,
Long leaning wings across the sea and land.
The waves creep back bequeathing to our sight
The treasure-house of their deserted sand,
And where the nearer waves curl white and low,
Knee-deep in swirling brine the slow-foot shrimpers go.

Pale breadth of sand, where clamorous gulls confer,
Marked with broad arrows by their planted feet;
White rippled pools, where late deep waters were
And ever the white waves marshalled in retreat
And the grey wind in sole supremacy
O'er opal and amber cold of darkening sky and sea.