31.   Once the Anasazi left the old empire, it seems, the ideological slate was wiped clean.

32.   Senior Andersen executives learned of the shredding weeks later, when lawyers for the firm discovered that laptop computers in Houston had been virtually wiped clean of e-mail messages.

33.   Separate the parts and wipe them clean.

34.   Starting Monday, the slate was wiped clean, and the Cowboys have as good a chance as anybody to reach the Super Bowl.

35.   The board, mercifully, was wiped clean.

36.   The bottom third of the wall is markerboard, or porcelain on steel, so washable markers can be wiped clean and magnets can affix art and photographs.

37.   The slate was wiped clean.

38.   The souvenir store at Bank One Ballpark was wiped clean of many items during the weekend World Series games.

39.   The slate is wiped clean.

40.   The slate will be wiped clean if they move forward to the final event on Sunday.