There is a further large barrow on Lady Downs at SW 4717 3651. Cornwall & Scilly HER description:
tumulus is marked at Lady Downs on current OS maps. Edmonds mentions a barrow 80ft (24.48m) in diameter and between five and six feet (1.52m to 1.83m) high. Henderson recorded “a very large ring type barrow, 66ft diameter (20.19m) and composed of loose stones. It is in a very mutilated condition and no large stones remain evidently due to having been used as a quarry”. Survey by the OS in 1961 recorded that the barrow is as described by Henderson and now has a maximum height of 1.7m.