Will and John were fairly weary after a day in foul conditions on Dorsal Arete yesterday so we went to get a bit more practise on moderately steep snow slopes today. We started up Great Gully and moved onto the broken ground beneath North Butress, finally descending the lower part of Curved Ridge. There was a frozen crust often several inches thick over a snowpack still saturated from yesterdays thaw. Another day/night or two of cold temperatures will help. There was evidence of a very large wet snow avalanche which had come out of the Crowberry Basin in yesterday's wet and mild conditions.