So how do you search for a specific but un-named image? A dragon, say, but not just any dragon. Well google search gave me lots of dragons, many as tatoos, but none were the dragon from the cover of Albion and the Jimi Hendrix at the Fillmore Auditorium poster.
Back to first principles: I had quoted Michael English as saying:
I was fascinated by the sinous yet romantic shapes found in Mucha's posters and the work of Beardsley and Rackham
This was the clue: I would look for dragons in Mucha's art. And I found: