Floating on water

At the circular quay huge wooden posts, formerly the trunks of great trees, have been drilled into the sea-bed. They support thick planks which, facing out to the bay from the shore-end of the dock, are supposed to protect the quay from boats or small ships that might ram into it. The planks serve another purpose: to still the water immediately beside the wharf. Pieces of paper, an orange peel and a can move about in one corner. Closer to me, there is a head floating on water.