Soon after these discoveries Dr. Schmerling published a work which described and represented a vast quantity of objects which had been discovered in the Belgian caverns. The scientific men were not yet prepared to receive the new discoveries, and it attracted but little attention at that time. Too much praise cannot be bestowed upon Dr. Schmerling for his unremitting labors. Of these labors Sir Charles Lyell has said: "To have undertaken, in 1832, with a view of testing its truth (antiquity of fossil human bones) to follow the Belgian philosopher through every stage of his observations and proofs, would have been no easy task even for one well-skilled in geology and osteology. To be let down, as Schmerling was, day after day, by a rope tied to a tree, so as to slide to the foot of the first opening of the Engis cave, where the best-preserved human skulls were found; and, after thus gaining access to the first subterranean gallery, to creep on all fours through a contracted passage leading to larger chambers, there to superintend by torchlight, week after week and year after year, the workmen who were breaking through the stalagmitic crust as hard as marble, in order to remove piece by piece the underlying bone-breccia nearly as hard; to stand for hours with one's feet in the mud, and with water dripping from the roof on one's head, in order to mark the position and guard against the loss of each single bone of a skeleton; and at length, after finding leisure, strength, and courage for all these operations, to look forward, as the fruits of one's labor, to the publication of unwelcome intelligence, opposed to the prepossessions of the scientific as well as the unscientific public;--when these circumstances are taken into account, we need scarcely wonder.... that a quarter of a century should have elapsed before even the neighboring professors of the University of Liége came forth to vindicate the truthfulness of their indefatigable and clear-sighted countryman."[4] In 1835, M. Joly, then professor at the Lyceum of Montpellier, found in the cave of Nabrigas (Lozére) the skull of a cave-bear, on which an arrow had left its mark. Close by, was a fragment of pottery marked by the finger of the moulder.