31.   Again, history provides some clues.

32.   Alas, watching the keys provides no clues to his fingering.

33.   But a new study may provide some clues on how to head off that progression.

34.   But a look at his record at Nabisco and Kraft Foods provides clues about how he will attempt to jump-start slumping Gillette.

35.   But because the steel provides no clues to the criminal investigation, New York City started sending it to recyclers.

36.   But a U.S. missile attack on Iraq, if tensions escalate to that level, could provide a clue.

37.   But any significant findings could provide clues to explore more systematically on later flights.

38.   But experiments with animals have provided some clues.

39.   But figures from the Board of Realtors provide clues.

40.   But filings with the Federal Energy Regulatory Commission provide a clue.