Since Bill never saw this man there is no point in describing him.

Why didn't Bill and his friend see us, for that matter?

Bill sees the gun in his hand, and is led to believe that he has killed Mary.

Bill looked again and saw that one man was left in the square; he hadn't noticed him at first.

Looking up, Bill saw that the end of the line looked a very long way away.

Bill saw that he had been correct to fear the worst.

Shaking his head, he walked back to where Bill could see him.

Bill looked past him and saw the body on the floor.

Five minutes later Bill looked up and saw blue sky.

Bill saw them sticking there so he quickly went on.