51.   But once you do that the mystery is gone.

52.   But the bigger mystery is why the second guard did not even notice me.

53.   But the biggest mystery may be Clinton.

54.   But the mystery is why Wrynn has been allowed to remain on the force this long, without being charged or punished.

55.   But the mystery of auctions is what keeps the audience riveted, as it did Thursday night.

56.   But the mystery is really rather transparent.

57.   But the real mystery is why the central bank of a chronically depressed economy refuses even to try.

58.   But there is a mystery, and that is enough.

59.   But there are enough mysteries to keep readers intrigued.

60.   But there is no mystery, really, in his goals.