This is unfortunate. You’ve been directed to a page that doesn’t seem to be here.
The site is an archive and virtually all pieces are here permanently. I do occasionally have a clear-out and delete pages, though these are almost always reviews of books that have gone out of print.
However, I am currently redesigning the site to make it less time-consuming for me to maintain. Though this isn't yet obvious, changes are progressively being introduced. One is that I have removed the plain text of newsletters, keeping only the HTML-formatted one, and retain only the past year’s issues.
If, outside these changes, the link you followed was from another page on this site, I do apologise and ask that you take a moment to tell me about it so that I can correct the fault. If the link was on a page on another site, I’d like to be given details of the referring page so that I can try to sort the matter out.