Sorry to drop in on the thread a bit late, and, strictly speaking, not
(according to headers) connected to the thread; I am well acquainted
with David Tilbrook, who is sadly not doing too well; it is not
surprising that Leah Neukirchen was unable to get a hold of him as he
hasn't been using email for some number of years > 1, and is
definitely not programming.
Hugh Redelmeier and I are looking into trying to do some preservation
of his QEF toolset that included the QED port.
Neither Hugh nor I are ourselves QED users; I'm about 30 years into my
Emacs learning curve, albeit using Remacs (the Rust implementation)
lately, while Hugh maintains JOVE to the extent to which it remains
maintained.
http://www.cs.toronto.edu/pub/hugh/jove-dev/
--
When confronted by a difficult problem, solve it by reducing it to the
question, "How would the Lone Ranger handle this?"