How to find it
On road leading eastwards from St Paul de la Jeune, take the dirt track to the right just beyond the 10km milestone. Follow the track until it splits and take the left fork, to quickly arrive at a parking space. To reach the entrance, continue along the main track until you reach a stone wall; cross over this straight ahead into an olive plantation. Keep heading straight on until you reach an area of pine trees and limestone pavement. The entrance---a round manhole covered by a metal lid---is situated a short distance into the area of trees, slightly to your right as you walk in.
50m of rope is insufficient to get down from the surface to the bottom of the second pitch -- it looked like significantly more would be required. From the bottom of the first pitch, turn right to get to the second (arrows marked on wall); the pitch straight ahead becomes too narrow.