Spy Park has, for many generations, been the property of the Baynton family, some of whom appear to have been knights of St. John of Jerusalem, in the time of Henry II. The late sir Edward Baynton Holt, bart. died at the advanced age of ninety, in January, 1800, when his estates devolved to his son and heir, sir Andrew Baynton Holt, who has recently sold or let Spy Park to colonel Thornton. The mansion is a plain but spacious building, seated in a park which abounds with fine old oak and other timber trees. The grounds are diversified by bold swells and winding vallies, and command at various stations, some extensive and interesting prospects. To the south-east the bold promontory called Roundaway-hill, presents its steep acclivity, with its commanding encampment on the summit. A range of lofty chalk-hills extend thence for several miles to the east, on the southern face of which is the White-Horse of Cherril, and above it is another encampment, called Oldbury-castle. At the extremity of the park, towards the west, the grounds slope gradually to the river Avon, and its fertile meadows; and at an old gate, called the Spy, a very extensive tract of country is unfolded. Whilst the plantations of Bowden Park, and the venerable abbey of Laycock, attract the eye near the fore-ground, the lofty free-stone hills around Bath are seen in the middle distance, and a large tract of Gloucestershire is observed extending to the north-east; whilst the more picturesque and romantic features of Somersetshire are beheld, stretching to the horizon, in the west and south-western directions. The park includes an area of nearly eight miles in circumference, and during the residence of the late sir Edward, its venerable forest-like trees were sacredly preserved from the axe; they were, however, I am informed, considerably thinned by the last proprietor. * * * * * Since the publication of colonel Thornton's departure from Yorkshire, the following letter has appeared in the public prints: