This article highlights some unconvincing elements in May Sinclair's The Flaw in the Crystal and lists some similarities between The Parasite by Sir Arthur Conan Doyle and May Sinclair's novella. These similarities and some other connections I noticed make the effort needed to decode the obscurities in The Flaw in the Crystal seem worthwhile.
First, two extracts that seem significant to me:
Playing the 'as if' game
There is no humour in The Flaw in the Crystal, but I find this passage where Milly Powell writes to Agatha about her husband Harding both interesting and amusing:
“She wrote as if it was Agatha's fault that he had become dependent; as if Agatha had nothing, had nobody in the world to think of but Harding; as if nobody, as if nothing in the world beside Harding mattered. And Agatha found herself resenting Milly's view. As if to her anything in the world mattered beside Rodney Lanyon.“
Off-the-mark, 'as if' messages are a special interest of mine. It was an unexpected treat to come across such a good specimen in a story written in 1912.
It is a pity that the whole story is not written in the straightforward style that we see in this passage.
Intention is everything
Just as many other people involved with unseen influences have done, Agatha Verrall realises that there is a dimension where thoughts have power. There, the wish or intention to do something is at least as effective as actually doing it in the real world:
“...that world where to think was to will, and to will was to create.“
“For thought went wider and deeper than any deed; it was of the very order of the Powers intangible wherewith she had worked. Why, thoughts unborn and shapeless, that ran under the threshold and hid there, counted more in that world where It, the Unuttered, the Hidden and the Secret, reigned.”
Despite what Agatha Verrall believes, this dimension, this world, is not necessarily a good place and the Powers that can be contacted there are not necessarily benevolent.