Darkness 'Til Dawn. Use a 70m rope to rappel or lower. If climbing with a 60m rope, you can belay from a ledge at the anchor, bring up your second, then carefully rappel and downclimb the last 30' to the base.
If lowering with a 60m rope (NOT recommended):
1. Tie a knot in the end of the rope! 2. The climber MUST downclimb the last 30' to the base.