Don't worry about giving it back but if anyone is heading to An Caisteal you should find a Trek Mate , Flick Lock walking pole (Green) around one or other of the little rocky mounds just below the summit.
Wife laid it down we think to take this photo so if you're bored work it out from there
An Caisteal Feb 23 2013 by
coachmacca, on Flickr
If anyone see's her nerve she also lost that coming back down around the step and could do with it back ahead of some ridges we plan soon.