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Twitter user @TK10815 tweeted a link to an i09 article that linked us to this Jen Heyward Tumblr blog.
The tumblr page has a few interesting items, the most significant of which is a translation of some manuscript pages written in the Czech language. Thankfully someone called I. Svobodová has translated it to English for Jen and each page appears as an image on the blog.
We are off to read the new words and see if / where they fit in S.
*** Update having examined the new pages, they appear to be part of chapter 10 and our current theory is that they start close to the top of page 451.
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In the background of the picture there is what appears to be some photograph contact strip images and a copy of Miracle at Braxenholm.