On Page 12 of THE THINGS THEY CARRIED, how Lieutenant Cross imagines Martha at the beach.

From the text:

He wondered how the tides and waves had come into play on that afternoon along the Jersey shoreline when Martha saw the pebble and bent down to rescue it from geology. He imagined bare feet. Martha was a poet, with the poet's sensibilities, and her feet would be brown and bare, the toenails unpainted, the eyes chilly and somber like the ocean in March, and though it was painful, he wondered who had been with her that afternoon. He imagined a pair of shadows moving along the strip of sand where things came together but also separated. It was phantom jealousy, he knew, but he couldn't help himself. He loved her so much.