Rob -- You are right concerning what I think (in retrospect) I should have done -- that is, tell the two that the 4th is missing and I'm going up. I think (!) I was about to do that when I saw her light coming down and thus the dilemna was solved.
After thinking about this on the way home, I concluded I should have immediately signalled to the other two that the 4th was missing and that I was going after her.
After thinking about this on the way home, I concluded I should have immediately signalled to the other two that the 4th was missing and that I was going after her.