What are they?—In the first place, the hair was not of the same average length, that from the head of the girl being, on the average, six inches longer than that from the blanket. In the next place, the hair from the blanket was of a light auburn colour, while the hair from the head was an auburn colour tending to red or a deep red. What is more important, the hairs from the two sets were not of the same diameter, and I cannot imagine why hair from the same head should differ in diameter. In the next place, in hair I have examined since, the frontal portion was quite red, and that from the back of the head quite dark, suggesting that where the hair is exposed, it lightens in colour, while in this case the hairs, which must have come from the back of the head, were actually lighter than those which came from nearer the front. In the next place, I found in my investigations hairs which were quite as like Alma Tirtschke’s as the hairs on the blanket, and though this does not prove that they were not Alma’s hairs, it prevents, by an elementary rule in scientific investigations, any deduction that they were. Lastly, it appears incredible to me, that if a girl of 13 were lying on a blanket for three hours she should lose 27 hairs—or rather that 27 of her hairs should still be remaining on the blankets at the expiration of a fortnight, during which the blankets had been removed to a distant suburb, and constantly handled. A MISSING LINK. There are other features about this hair examination which call for comment. When a man is on trial for his life, he himself, his counsel, and indeed the public generally, are entitled to demand that every link in the chain connecting him with the murder shall be found in its place. It was objected on the appeal that a link was missing in the case of the blankets, since it was not shown where they were during the night preceding their handing over to the analyst. One of the learned judges in the High Court asked whether this “sinister suggestion” had been put to the detectives. With the greatest respect, it is not, in the first place, a sinister suggestion, but an elementary requirement in proof; and in the second place, it is no part of the duty of a defending counsel either to fill up gaps in the Crown evidence, or to give the Crown witnesses a lead by which they may do it. But a blow would be struck at the whole administration of justice, if once the principle were admitted, that evidence, just because it is police evidence, is not to be subjected to the ordinary tests. The principle admitted, it would soon come to be known and traded upon, and the result would be the lowering of the whole morale of the Detective Force. The logical outcome would be the transfer of the seat of justice from the Law Courts to the Detective Office. It is the knowledge that their evidence will have to run the gauntlet of the fiercest criticism and examination which the skill of the bar can bring to