I think the English words would be.....
Memory, which is quickly going away at age almost 75.
Intuition.... Your tip was very valuable and got me on a specific track.
Luck, I had remembered the other photo from perhaps a year ago on another search.
And finally, a decision to make a guess. This is something you know I do not like to do. I like to positively identify any of my proposed puzzle solutions. Once in a while, I violate this rule and take a chance. In this case, I was lucky.
That is was solved "so quickly" is perhaps not quite the case, as I had spent so many hours on research before it moved from rookie to expert to professional. Once it move to my level, I had to take a chance.
Thanks again for the opportunity to solve a puzzle.
Bill