These pages are made by one person with one laptop computer, and sometimes circumstances cause a longer than usual gap between additions to what I try to maintain as a site with new material added as often as possible. Current circumstance is that my laptop is out of action after the cat peed on it. Though the lid was closed there has been some ingress via sockets at the back. I’ve part disassembled it and it’s drying … but as this particular machine is my work machine, and this other device I’m writing this on isn’t really up to making pages for this site, there’s a longer than usual delay in content creation. Thank you for your patience.