Objects and substances having a fairly uniform value, resulting from their utilitarian attributes, have been employed by primitive peoples as standards of value; as, for instance, cattle, in ancient Rome; salt, in Assyria; tin, in Britain, and cocoa, in Mexico. But such mediums of exchange are local in use. With these articles this function is only accidental. The utilization of shells for money would naturally originate from the trade arising from their use as utensils and ornaments in districts remote from the source of supply. Yielding in the worked state a limited supply, and at the same time filling a constant demand, they formed a natural currency, their universal employment for purposes of ornament giving them a fixed and uniform value. They have undoubtedly been greatly prized by the ancient peoples, but on the part of the open-handed savage they were probably valued more as personal ornaments than as a means of gratifying avaricious propensities. Lewis H. Morgan, who had access to all the sources of information on the subject, says that "wampum has frequently been called the money of the Indian; but there is no sufficient reason for supposing that they ever made it an exclusive currency, or a currency in any sense, more than silver or other ornaments. All personal ornaments, and most other articles of personal property, passed from hand to hand at a fixed value; but they appear to have had no common standard of value until they found it in our currency. If wampum had been their currency it would have had a settled value, to which all other articles would have been referred. There is no doubt that it came nearer to a currency than any other species of property among them, because its uses were so general, and its transit from hand to hand so easy, that everyone could be said to need it." Yet he admits that "the use of wampum reaches back to a remote period upon this continent"; and further, that it was an original Indian notion which prevailed among the Iriquois as early at least as the formation of the League. He goes on to state that "the primitive wampum of the Iriquois consisted of strings of a small fresh-water spiral shell called in the Seneca dialect _Ote ko-á_, the name of which has been bestowed upon the modern wampum."[80] Loskiel says that "before the Europeans came to North America, the Indians used to make strings of wampom chiefly of small pieces of wood of equal size, stained either black or white. Few were made of muscle, which were esteemed very valuable and difficult to make; for, not having proper tools, they spent much time in finishing them, and yet their work had a clumsy appearance."[81] Hutchinson is of the opinion that "the Indians resident northeastward of the province of New York had originally no knowledge of this sort of money or medium of trade."[82]