The flint of the cretaceous deposits does not occur in America. True chalk is all but unknown among the cretaceous strata of the continent, although it has been found in the form of a somewhat extensive bed in Western Kansas. In Texas, the cretaceous limestones contain in places hornstone nodules distributed through them, like the flint nodules in the upper chalk beds of Europe. But though, so far, differing in origin, the hornstone and flint are practically identical; and the chert, or hornstone, which abounds in the chert-layers of the corniferous formation, of common occurrence in Canada, is simply a variety of flint, consisting essentially, like the substance to which that name is specifically applied, of amorphous silica, and with a similar cleavage. This Devonian formation is made up chiefly of limestone strata, parted in many places by layers of chert which vary in thickness from half an inch to three or four inches. The limestones are more or less bituminous, and frequently contain chert nodules. Most of their fossils are silicified. The formation underlies a considerable portion of South-western Ontario. Out-crops occur at Port Dover, Port Colborne, Kincardine, Woodstock, St. Mary’s, and other localities. At a point which I have explored more than once near Port Dover, implements occur in considerable numbers, along with fractured or imperfect specimens, mingled with flakes and chippings, evidently indicative of a spot where their manufacture was carried on. At this, and some others of the localities here named, Canadian flint pits may be looked for. Among other objects illustrative of primitive native arts in the Museum of the University of Toronto, is a block of flint or brown chert, from which flakes have been struck off for the use of the native arrow-maker. This flint core was found in a field on Paisley Block, in Guelph Township, along with a large flake, a scraper, and fourteen arrow heads of various sizes, all made from the same material. Alongside of them lay a flint hammer-stone bearing marks of long use. All of those objects are now in the University Museum, and appear to indicate the site of an aboriginal workshop, with one of the tools of the ancient arrow-maker, who there fashioned his implements and weapons, and traded with them to supply the need of the old Huron or Petun Indians of Western Canada. The Spider Islands in Lake Winnipeg, near its outlet, have been noted by Dr. Robert Bell, as a favourite resort of the old workers in flint, where they could trade the products of their industry with parties of Indians passing in their canoes. “I have found,” he says, “a considerable number of new flint implements, all of one pattern, in a grave near one of those sites of an old factory”; the body of a man—presumably the old arrow-maker,—had been buried there in a sitting posture, surrounded with the latest products of his industrious skill.