Milestone Approx 137m South-East of the Meadows

This milestone, located approximately 137 meters south-east of The Meadows, was erected in the 1830s as part of improvements made by John Hearle Tremayne to the transportation routes around the Heligan estate. It has a triangular shape with a flat top that slopes slightly upwards at the back, standing 0.69 meters high. The stone is painted white with black lettering, inscribed with "St.A 3" on the south face and "HELIGAN 1¾" on the north face. A large Ordnance Survey benchmark is carved on the upper front of the St Austell face.

In the 1820s, the road from St Austell to Pentewan was developed for the export of China Clay. During the 1830s, John Hearle Tremayne, who was the squire of the Heligan estate from 1829 to 1851, created a long drive from Pentewan to Heligan to allow horses to transport coal from St Austell, and the milestone was erected at that time. It is marked on the first edition Ordnance Survey map of 1880.

The milestone is designated at Grade II for its intactness, as it remains in its original position and is a complete example from the 1830s. It is also rare, being an unusual milestone erected by a private landowner rather than a turnpike trust, indicating the distance to a country estate. Additionally, it has historical significance due to its association with the Tremayne family, who are known for creating the gardens around Heligan House, now referred to as the Lost Gardens of Heligan.