The rare first folio of William Shakespeare's plays that was stolen from Durham University in 1998. The collection was returned in 2010.
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Sunderland AFC legend Kevin Ball is backing the club's new campaign to support homeless young people who are in need.
The children on board were from Easingwold School and were travelling along roads affected by heavy rain and flooding after Christmas.
The walls had been closed to the public at the weekend amid fears of a collapse.