The rudest class of personal ornaments which are found in the sepulchral mounds, or in the safer chance depository of the bogs, are those formed of bone or horn; but they are necessarily of rare occurrence, not only from the remoteness of the period to which we conceive them to belong, but from the frail nature of the material in which they have been wrought, which, when deposited among the memorials of the dead, yields to decay not greatly less rapid than the remains it should adorn, and crumbles to dust when restored to light and air. Still some few of these fragile relics have been preserved, consisting of perforated beads of bone, horn pins, perforated animals' teeth, and other equally rude fragments of necklaces or pendants; but very few of them present much attempt at artificial decoration by means of incised ornaments or carving, such as is found to have been so extensively practised in a later age. One curious set of bone ornaments in the Scottish Museum includes a piece of ivory pierced with a square perforation, and another with a nut or button fitting into it, the clasp or fibula it may be of some robe of honour worn by a chief of the ancient race. Ornaments of jet or shale and cannel coal, and large beads of glass and pebble, are of much more frequent occurrence in the Scottish grave-mounds, and furnish extremely interesting and varied evidence of the decorative arts of these remote ages. Many of them, however, are found under circumstances which leave no room to doubt that they belong to a period coeval with the introduction of metals, and the skill acquired in the practice of the metallurgic arts. [Illustration]