Chain Back with conduit and milestone

The Chain Back is a Grade II listed retaining wall, approximately 75 meters long, made of stone rubble, which supports a raised roadway in front of several houses and is ramped at both ends. There is a flight of steps leading up to house number 70. The wall is topped with grey limestone coping beneath a 20th-century cemented kerb surface, which features embedded cast-iron bollards connected by iron chain railings from the middle bosses, an iron tubular rail from the top bosses, and ball finials. Embedded within the wall, below house number 74, is a conduit and milestone. This consists of a rectangular structure made of dressed grey limestone, featuring a semi-circular niche, a cornice, and a crowning semi-circular stone. A square cast-iron plate inscribed with 'Tenby/ 10/ miles' is attached to the structure, and there is a tap in the niche that is fixed to an iron plate marked 'J. Stone & Co Deptford'.