the text ... http://www.gutenberg.org/ebooks/60805 a modern review http://psypressuk.com/2010/02/28/literary-review-the-seven-sisters-of-sleep-by-mordecai-cooke/
a short but richly informative talk given by rick knecht at cardiff this year ... https://www.youtube.com/watch?v=8XhgetM5ApU and an excellent short film on the subject ... https://www.branstetterfilm.com/docads/