| M. Brault - Discovery of the site | Found a way out digging his garden. |
| René Verneau - Archaeologist, National Museum | Directed the excavations in 1889. |
| Manouvrier - Anthropologist | Analysed the skeletons and their sizes. |
| Paul de Mortillet - Prehistory | Proposed two theories on entry. |
| Adrien de Mortillet - Archaeologist | Hypothesis on the anteroom and staircase. |