It seems almost incredible that the Indian could produce so clever an article with his rude implements. Some have conjectured that the specimens produced before the natives obtained awl blades from the colonists were very inferior to their later productions. One writer[5] even goes so far as to suggest, that, before the advent of Europeans, Indian beads consisted mostly of small pieces of wood, stained white or black. The fact is, however, that the manufacture of wampum dates back at least to the time of the mound builders, for quantities of beads similar in form to the more modern article, and proved by chemical tests and structural peculiarities to be similar in material, have been exhumed from the ancient mounds of the west.[6] Other species besides the wampum and suckauhock crept into local use among the different tribes. The Iroquois in their civil and religious ceremonies employed a variety named _otekoa_, and made from spiral fresh water shells of the genus _unio_. This as may be inferred from its uses was held in the highest esteem, and no other could be employed in the different stages of the ceremonial.[7] In New England and perhaps elsewhere, an inferior kind made evidently from shells too small and thin to be wrought into the cylindrical beads, circulated to a limited extent. The separate pieces were round and flat, about an eighth of an inch broad and a sixteenth of an inch thick, white and black were strung alternately, but the strings, though arranged with considerable nicety, lacked wholly the finish and flexibility of the regular article. In Virginia _roenoke_ was current. This consisted of small rough fragments of cockle shells, which were drilled and strung. The last two varieties were only used to a limited extent, even in the region of their manufacture. Here, as elsewhere, the cylindrical wampum was the standard, and the dearest to the Indian of all his treasures. Indeed such was the value set upon it, that attempts were often made to counterfeit it, an unallowed shell being fraudulently used in the manufacture of the white, while the black was imitated from a kind of stone. Yet the habitual caution and keenness of the Indian made it difficult to palm off the spurious article upon him.