I was very sad when learned that Janet, Arthur's daughter, and the patron of The Friends of Arthur Machen passed away in October aged 91.
I first met her in Usk in 2002 I believe. She was unfailingly courteous and kind and a font of fascinating conversation not only about her father but her interesting life in general. It was an honour to know her and she was very helpful in the Machen scuplture project as well as with the society in general. I saw her again in March 2009 at Stratford and she was in good spirits and full of life so her death seemed all the more surprising.
You can read obituaries of Janet online at the Friend's website and another was published in The Guardian.