Jill had to point it out to him and tell him that it was water, and Dorcas added that it was the Atlantic Ocean and traced the shore line on the map.  Mike was not ignorant: he had known since he was a nestling that the planet next nearer the Sun was almost covered with the water of life and lately he had learned that these people accepted this lavish richness casually.  He had even taken, unassisted, the much more difficult hurdle of grokking at last the Martian orthodoxy that the water ceremony did not require water, that water was merely symbol for the essence beautiful but not indispensable.