An oval arrangement of trees, roughly 61 metres along its north-east to south-west axis and around 48 metres across, once defined a deliberate shape in the landscape. Today no trees mark it out, no earthwork betrays it, and nothing interrupts the grass. It exists, for practical purposes, only in maps and in light.

The tree-ring first appears as a recorded feature on the 1946 to 1947 revision of the six-inch Ordnance Survey map, where it is plotted as a distinct oval form within the designed landscape of the demesne. Tree-rings of this kind were typically planted as ornamental features on eighteenth or nineteenth-century estates, intended to create visual punctuation across parkland, sometimes enclosing a specimen tree or a small building, sometimes existing simply as a formal gesture in the design of the grounds. Whatever stood or grew within this one is no longer apparent. By the time an aerial survey captured the site on 10 July 1973, the trees themselves were gone, but the ground retained their memory. The photographs show a cropmark, the faint differential in vegetation growth that occurs where buried roots, disturbed soil, or altered drainage cause crops or grass to respond differently to moisture and heat. It is one of the quieter ways the past makes itself legible, invisible to a person walking across it but readable from several hundred feet above.