But since no paperwork on its provenance has ever been found, the mystery persists.

But the rumor, and the mystery, persisted.

The mystery persisted for more than two weeks, as the authorities cleaned out an estimated 120 tons of debris, including 14 grand pianos.

But a mystery persisted over the missing thousands known to have been in the Soviet zone of Poland and who had disappeared.

The mystery of who the man was - of why he was the way he was - persists.

The mysteries have persisted because little new data have been collected.

The elemental mystery of Strauss persisted.

Because these sessions are closed, except to certain professional observers (and students from the master's program), a certain mystery still persists.

But mysteries persist.

But the mystery of who did it has persisted to this day.