SINGULAR FACT.—A wheelwright, residing at Petersfield, in Hampshire, in cutting up some oak timber lately, found a large quantity of hair in the very centre of the tree, which was of considerable dimensions. The hair was in the most perfect state of preservation, although, from the depth at which it was embedded in the wood, there can be no doubt that it had been there upwards of 60 years. It is conjectured, that a cavity had originally been made in the tree, and that after it had been deposited, part of the wood was immediately replace; but that in process of time the bark grew over it, and re-united it to the parent trunk, and thus caused this singular phenomenon.