[urbanspaceman]

Thank-you Jim... I really appreciate that.
I think you do not do yourself justice though... there was far more than your global encyclopaedic research facilities involved, there was also - along with Peter's - your decades of experience and understanding guiding a total novice in so many ways, often simply playing 'Devil's Advocate' to spur my determination to unearth the truth... so valuable.
It is such a broad story, so many attendant issues materialised and needed to be given attention... here again, you and Peter kept me right.
My follow-up project is - of course - the unresolved question of the hollow-bladed colichemarde; so I am hoping I can count on your guidance and knowledge again.
Many thanks to you both, Keith.