A British caver who knows the Pucelle better than me sent me the following information in an email:
"Pucelle has 10 pitches
largest 8 m. Do the trip in a wet suit and go straight down the stream
way. Fantastic trip. Best way is with 8 ladders because you can free
climb a couple of pitches ( can't remember which ones) 3-4 slings to
hang on the deep pools so you can get out of them on the way back up
stream. a few belays, bolt and hangers.
If you take rope you spend hours faffing about rather that just enjoying
the place."