I imagine a lot of you are talking about the Leroy Lettering type stuff.

Thanks for the input so far. I'm following some of it up.
The Concord/Crofty/Pendarves/Jane/Geevor modern plans are all pretty much identical in format.
Having had a bit more of a read into the subject, it appears what I am looking for is more of an "arty" book. You are armed with your hard data and it's a matter of composition, typography and colour.
I have a whole series of books, which I expect were standard college texts early last century. One of these is titles "A treatise on mine surveying - Brough" It has a section on plan production and goes into the various standard colours expected and a few rules of setting out, but nothing really concrete.
Perhaps this is the way they went about things. "Here is my raw data, here are the few conventions I must obey, the rest of it is up to me"
Perhaps they did their own calligraphic and typographic research and then this is what set them apart for others.
Being moderately lazy, I like to absorb things via a book. I see there are modern books on composition, typography and colour as applied to map making, but again, it's not going to teach me how to draw a super edge ornament, or a really spangly title from first principles.
I have surveyed workings and plotted them for a while, it remains a challenge to present them in a way which is a bit beyond a "pass" grade.
The isometric drawing e-book is interesting BTW.