"Regent's Park, and its circumjacent buildings, promise, in few years, to afford something like an equipoise to the boasted _Palace-group_ of Paris. If the plan already acted upon is steadily pursued, it will present a union of rural and architectural beauty on a scale of greater magnificence than can be found in any other place. The variety is here in the detached groups, and not as formerly in the individual dwellings, by which all unity and grandeur of effect was, of course, annihilated. These groups, undoubtedly, will not always bear the eye of a severe critic, but altogether they exhibit, perhaps, as much beauty as can easily be introduced into a collection of dwelling-houses of moderate size. Great care has been taken to give something of a classical air to every composition; and with this object, the deformity of _door-cases_ has been in most cases excluded, and the entrances made from behind. The Doric and Ionic orders have been chiefly employed; but the Corinthian, and even the Tuscan, are occasionally introduced. One of these groups is finished with domes; but this is an attempt at magnificence which, on so small a scale, is not deserving of imitation." * * * * * THE ISLE OF SHEPPEY. (_To the Editor of the Mirror._) Sir,--Under the _Arcana of Science_, in your last Number, I observed an account of the inroads made by the sea on the Isle of Sheppey, together with the exhumation there of numerous animal and vegetable remains. As an additional fact I inform you, that, at about three hundred feet below the surface of the sand-bank, (of which the island is composed,) there is a vast prostrate antediluvian forest, masses of which are being continually developed by the influence of marine agency, and exhibit highly singular appearances. When the workmen were employed some years back in sinking a well to supply the garrison with water, the aid of gunpowder was required to blast the fossil timber, it having attained, by elementary action and the repose of ages, the hard compactness of rock or granite stone. Aquatic productions also appear to observation in their natural shape and proportion, with the advantage of high preservation, to facilitate the study of the inquiring philosopher. I have seen entire lobsters, eels, crabs, &c. all transformed into perfect lapidifications. Many of these interesting bodies have been selected, and at the present time tend to enrich the elaborate collections of the Museum of London and the Institute of France. During the winter of 1825, in examining a piece of petrified wood, which I had picked up on the shore, we discovered a very minute aperture, barely the size of a pin-hole, and on breaking the substance by means of a large hammer, to our surprise and regret we crushed a small reptile that was concealed inside, and which, in consequence, we were unfortunately prevented from restoring to its original shape. The body was of a circular shape and