31.   Ambrose, a respected historian who is an emeritus faculty member at the University of New Orleans, was unavailable for comment.

32.   American Airlines officials were unavailable for comment.

33.   An attorney for Heil was unavailable for immediate comment.

34.   An American Express spokesperson was unavailable for comment on Tuesday night.

35.   An attorney for J. Walter Thompson was unavailable for comment.

36.   An aide to Greene said he was unavailable for comment.

37.   An aide to Ms. Walker said she would be out of the office for three days and was unavailable for any comment beyond the letter already sent to Roach.

38.   An American Express spokesman declined to comment, and LPL officials were unavailable for comment.

39.   An assistant to Schmalensee said Tuesday that he was unavailable for comment.

40.   An H.I.S. spokesman was unavailable for comment.