After the failed airlift attempt, a mountain rescue team from Lochaber - helped by local volunteers - set off to find the pair. They found them freezing and huddled together for warmth at 11am and helped them down the mountain.
Both men were suffering from the effects of cold but uninjured.
Nigel added: "I spoke to Bob and Billy at about 4.30am and they were shattered.
"Before they went to Scotland they had spent 10 days climbing in Norway so they know what they're doing.
"Luckily they did the right thing and sat tight when they realised they were lost. This sort of thing can happen to climbers but it was a great feeling when I knew they were safe and sound."
A spokesman for Fort William police said: "The two climbers, although reasonably well equipped, were inexperienced for the route chosen, and failed to allow adequate time to complete the route.