GRAY-WETHERS, (Wiltshire) on Marlborough-Downs, are loose stones so called, because they appear to travellers at a distance like straggling sheep. They are a sort of white marble and lye on the furface of the ground in infinite numbers, and of all dimensions. Dr. Stukely thinks they have lain here ever since the creation; and that they were solid parts, thrown out to the surface of the fluid globe, when its rotation was first impressed.