Pliny (29 c. 3) tells us that the Emperor Claudius put to death a knight of the Vocontian Gauls for carrying a serpent-egg (_ovum anguinum_) about him while engaged in a lawsuit. He also gives a description of the manner in which the egg or bead is manufactured by the serpents. In summer innumerable serpents enwrap one another, and generate the egg from the slaver of their jaws and bodies. They then, according to the Druids, cast it up into the air by their hissings, when it must be caught in a garment lest it touch the ground. The person who is bold enough to intercept it must fly away on a horse, for the serpents follow till a river intercepts them. The test of a true egg is, that it swims against the stream, even if bound in gold (_si contra aquas fluitet, vel auro vinctum_). The Druids further say it must be got at a particular season of the moon. The one Pliny saw was about the size of a round apple. It procures victory in lawsuits, and entrance to kings. The tales told in modern times of the Serpent Stone, its manufacture and wonderful properties, are of a similar class, and leave no doubt that in these beads and the use made of them we have the remains of an imposture, if not instituted, at least practised by the Druids. The ordinary _Glaine Nathair_ (Serpent Glass) is of smaller size than is indicated by Pliny. The one which the writer saw was about the size of a gun bullet, and about 1¼ in. long. There was a hole through from end to end, and depressions on its sides, as if it had once been soft, and had been taken up gently between the finger and thumb. It is of transparent glass, but glass unlike that of the present day. There are extremely brilliant and curious streaks of colour in it. It is now merely a family heir-loom, but in olden times was in great demand for dipping in water to be given to bewitched persons or beasts. The sloughed skin (_cochull_) of the serpent itself was used for the same purpose. Water in which it was dipped was given to sick beasts. The tale as to the manner in which it was originally got is the same as is told of other beads of the same kind. The serpents are assembled in a coiling mass, with their heads in the air hissing horribly, slavering, and out of their slaver making the serpent stone. The spittle, in course of becoming solid, was known as _meall èochd_. That the story was not implicitly believed is shown by the addition that, when the bead is finished, one of the serpents puts its tail through it. Thus the hole by which it is perforated is made.