He had excavated the type site of the Azilian Culture, the basis of today's Mesolithic. He found it sandwiched between the Magdalenian and the Neolithic. The tools were like those of the Danish kitchen-middens, termed the Surface Period by Evans, which were the basis of Westropp's Mesolithic. They were Mode 5 stone tools, or microliths. He mentions neither Westropp nor the Mesolithic, however. For him this was a "solution of continuity ("solution de continuité")" To it he assigns the semi-domestication of dog, horse, cow, etc., which "greatly facilitated the work of Neolithic man ("a beaucoup facilité la tàche de l'homme néolithique")." Brown in 1892 does not mention Mas-d'Azil. He refers to the "transition or 'Mesolithic' forms" but to him these are "rough hewn axes chipped over the entire surface" mentioned by Evans as the earliest of the Neolithic. Where Piette believed he had discovered something new, Brown wanted to break out known tools considered Neolithic.