Studio Talks - coming up...
I am aware that some of these lectures are "out there," and I have had bad photocopies of them for many years, but these scans are from the "real deal," in this case from "copy 25" which was originally owned by animator Don Patterson. This folder is marked "Series I."
I do not know of other volumes in this same series.
[Edit: I checked: it wasn't Ray but Don Patterson who owned this.]