Hi Mark,
Thank you for your post (and depth of reference material!
)...
To what degree - if any - documentation exists I cannot say. As I understand it, the provenance is known but not documented, though I am not certain of this... I'll follow up on this over the next couple days and post any additional findings regarding provenance should there be any.
Also, I guess I have to address that proverbial elephant in my browser window, i.e., that damn inbox that's been full since I don't know when, and clean out a few msgs to make room for some queries I'll be sending via PM...
Gene, 'Nando, Richard, and of course Mark - thank you all...
Cheers,
Chris