I mustn't be churlish but I wish Volume III was there as well. It contains very interesting material by Perring which was published as Volume III but by a different publisher. It's very rare to find all three volumes together. I once had the intention of scanning my potocopied edition of the same material as on Google and adding it to my website so they've saved me the job. It's a shame that the fold out plates aren't included though as they are one of the glories of the original book and have suffered considerably in my photocopied edition.

Jon