A few months ago Sylvestre Clément gave his agreement for the work he did on the site https://coume-ouarnede.fr to be archived on Grottocenter.
This is now done and you can now enjoy, in a different way, the exceptional work he did on the Arbas massif and in particular on the Henne Morte / Félix Trombe network
You can discover it here
https://grottocenter.org/ui/caves/75342
The Wiki database made by cavers for cavers.