I've added a clarification to the end of the post on whether angzarr might be found in the Cambridge Library document, which I mentioned in my twitter thread but not in the post:
> Furthermore, the Rare Books department tells me that “unfortunately none of [the materials] seem to mention S16137 through S16237”. It’s possible the glyph is listed without its serial number, but it’s equally possible that this document skips that range altogether, just as 4-Line Mathematics had.
I'd also like to point out that Cambridge alumni are unlikely going to be able to request scans for free; I think you need to be a current faculty or student.
When I tried to request it via ILL, they told me that the amount of material scanned "exceeds copyright law and scanning limits". I haven't bothered to look up whatever law that is, and I'm not sure if it's a US thing, or if it's on the UK side, and if so, whether students/faculty at Cambridge are under the same restrictions and they'd have to end up paying the same fees as well. I have a friend whose advisor works there, but I'm reluctant to ask them for the favour and potentially drag them into numerous back-and-forth emails with Cambridge Library and copyright issues...
> A test case for the bottom-up methodology is the bottom meson, a composite particle made of something called a bottom quark and another known as a lighter quark.
I thought mesons were just a quark + an antiquark, I suppose they meant another (anti)quark that's lighter than the bottom quark?
> Scans are provided with certain conditions of supply:
> 1. Not pass on, or upload, the electronic copy or make it available to any other person
> 2. Not make further printed or electronic copies
:shrug:
[1] https://www.lib.cam.ac.uk/search-and-find/zero-contact-servi...