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The tumulus, which is crowned with a chapel, was excavated by Ren� Galles in 1862; and the contents of the sepulchral chamber, which include several jade and fibrolite axes, are preserved in the museum at Vannes.

This rock, which was so extensively employed by the Pueblo Indians for the manufacture of various utensils, has proved to be composed largely of quartz, intermingled with which is a fine, fibrous, radiated substance, the optical properties of which demonstrate it to be fibrolite.

The fibrolite imparts the toughness to the rock, which, I should judge, would increase its value for the purposes to which the Indians applied it.”

The rock is therefore fibrolite schist, and from a lithological standpoint it is very interesting.

With it were picked up polished fibrolite, basalt, chloromelanite, serpentine, and diorite hatchets; evidently made in the neighborhood, as is proved beyond a doubt by the numerous chips and partly worked pieces lying about, as well as the discovery of no less than thirty polishers, many of them showing signs of long service.