The sheets were taken sometime between 12:45 on Wednesday 29 July and 10:00 the following morning.
Anyone who witnessed the theft or has any information about what happened is asked to contact PC 100 Simon.
He can be contacted by calling the police station on 725111 or by emailing Samuel.Simon@guernsey.pnn.police.uk. Alternatively people can call Crimestoppers on 0800 555 111.