A piece of history from Anne of Green Gables’ author Lucy Maud Montgomery has gone missing from a P.E.I. museum.

A postal cancellation seal — which is a stamp that was used to seal letters and cancel postage — that Montgomery used during her lifetime has gone missing from her former home in Cavendish, P.E.I.

After holding a few teaching positions on P.E.I. following a brief stint at Dalhousie University in Halifax, Montgomery moved to Cavendish in 1898 to help her grandmother at the local post office. She worked there for 13 years.

The missing stamp was used in the community’s post office for nearly 200 years.

The item was kept in a bookshop at the Site of Lucy Maud Montgomery's Cavendish Home, which is now a museum and designated a Canadian National Historic Site.

Montgomery’s descendants, who now live and maintain the property where the author lived for more than 30 years, say they discovered the artifact was missing on Friday.

The family is waiting to make contact with the RCMP to provide them with further details.

Montgomery introduced readers to one of Canada’s most enduring fictional characters, Anne . The heartwarming story of the red-headed orphan with a penchant for trouble has gone on to sell hundreds of millions of copies and became the basis for numerous television, film and stage adaptations.