Lost Daphne du Maurier story found after 70 years

I love stories like this one: a literary gem unearthed after so many years. Over the past year I have been collecting newspaper cuttings of similar stories: an 1848 Emily Bronte letter going on display at the Parsonage Museum in Haworth; letters by Ted Hughes being bought by the British Library; a postcard written by a Titanic passenger auctioned at Henry Aldridge and Son; etc. I imagine it was just as thrilling for Ann Willmore to find the lost Daphne du Maurier story in an online publication as it would have been for her to find it in a cemetery of forgotten books.