Lord Albert, I agree wholeheartedly, and I beg your forgiveness for correcting you, but I believe you meant to say "halcyon" days. This is how it is spelled, in the Queen's land and on the vulgar continent we inhabit. It appears that halcion is a sleeping drug, which would make for quite a boring history indeed!
As for the falcons, they did not appear to have success nesting on Snow Creek Wall last year. Late in the season I saw parts of a dead bird looking very much like a falcon near their ledge. I also saw pieces of broken egg. It appears they did not protect the traverse properly.