Norbert Casteret

Norbert Casteret (19 August 1897 – 20 July 1987) was a famous French caver, adventurer and writer, and is one of the most recognisable names in caving worldwide. Following Édouard-Alfred Martel (the "father of modern speleology", although Casteret sometimes also enjoys this title), Casteret, along with Robert de Joly, became a leading figure of French speleology between the world wars and into the middle of the 20th century. Provided by Wikipedia