I don't think my climbing partner is on UKC so I'm posting on his behalf.
Big thanks to the group that rescued his pack today in Stob Coire Nan Lochain. Just as I was topping out seconding him up Dorsal Arete a very sudden, strong gust blew his rucksack off the top and down one of the gullies despite it being several metres back and behind a whacking great rock. You picked it up and left it by the stream for us.
We're just grateful it didn't hit anybody on the way down.