Chris (and others)
Thank you very much for your responses.
Immediately after posting my question I called my friend and fellow researcher in the UK, Clive Richards. He was nice enough to share quite a bit of information about the weapon, including about your (Chris') reference to it in "Vulcan's Hammer", which I don't have.
I've since found additional references to the weapon, including an AAF internal communication that goes into a bit of detail about an RAF British investigation into various schemes that could be used to carry "Journey's End" in the Lancaster/Lincoln aircraft. There were five schemes. I have the id's on the drawings, but obviously not the drawings themselves. Yet.
Chris, in your research did you come across any of this? Do you happen to have a photo and/or drawing of "Journey's End"? If so, can I obtain copies?
Chris, I haven't contacted our mutual friend, Tony Buttler, about this yet, so perhaps he might have more info.
Thanks again to all.
AlanG