Ralph remembered another small boy who had stood like this and he flinched away from the memory. He had pushed the thought down and out of sight, where only some positive reminder like this could bring it to the surface. There had been no further numberings of the littluns, partly because there was no means of insuring that all of them were accounted for and partly because Ralph knew the answer to at least one question Piggy had asked on the mountaintop. There were little boys, fair, dark, freckled, and all dirty, but their faces were all dreadfully free of major blemishes. No one had seen the mulberry colored birthmark again. But that time Piggy had coaxed and bullied. Tacitly admitting that he remembered the unmentionable, Ralph nodded to Piggy.
Carefully re-read the passage above. Which word can be said to MOST clearly show Ralph's remorse over the disappearance and probable death of the boy with the mulberry-colored birthmark?