An early Banksy artwork believed to have been sprayed in 1999 or 2000 has appeared at a school art exhibition in the town of Nailsea, near Bristol, England, the Guardian has reported.

The stencil known as Leopard and Barcode was first discovered on the side of a house on Pembroke Road, Bristol. During redevelopment work on the building in August 2010, the artwork mysteriously disappeared, much to the disappointment of local street art fans.

Just over four years later, on Tuesday, the piece reappeared at Nailsea School. It was brought in by a teacher who had kept it under her bed, wrapped in a blanket since 2010. The teacher admitted that her husband, an architect, had taken it off the property’s wall after the owner had expressed his desire demolish the structure and rebuild.

“My husband was working on a building project on Pembroke Road and the Banksy was on one of the walls,” the teacher recounted to the Guardian. “It was going to be covered over or destroyed so he sought permission from the owner to remove it and keep it himself. The owner agreed so one afternoon he spent four hours cutting it out. We wrapped it in a blanket and have kept it under our bed ever since.”

The teacher said that she had brought the piece in to help promote the school. The couple are not currently seeking to sell the artwork. “It is an early Banksy, one of his original stencil works. It might be a nice legacy for us to pass to our children,” she said.

According to the Bristol Post a similar piece fetched £76,650 ($125,000) at Bonham’s in 2012.