Continue on out of the cave toward the cliff side above the sea. Head to the left along the progressively narrower path until he's taken several steps past the lower pathway, which is now visible from above. Have him walk over the edge and hang down and drop to it. He can then turn to the left and run to the edge and jump across the gap over to the other side. Continue to the left, then climb up on the ledge above. Walk carefully to the left until he can drop down to the ledge below. Drop down onto it then climb up on it and continue left. Follow this somewhat longer ledge around as far as possible, then back up a step, then drop down multiple times to the wider ledge at the bottom. Carefully jump over the ledge on the left. He may grab onto the ledge above or land on the ledge below. In either case he needs to get up on the ledge above and continue to the left until he's over the large dual rusty pipes. Have him drop down onto the pipes and make his way across to the other side. Continue inside and around the bend. Then through another opening into the ante chamber and finally on to the end where further progress is blocked by a metal grate.