[1] Leahill 51b was built shortly after AD 122 as part of Hadrian's Wall, dismantled under the Emperor Septimius Severus, and casually re-occupied late in the 4th century.

A small cottage, still occupied in living memory, once stood close by on the opposite side of the existing road, and robbing also took place to supply material for the drystone dyking and the farm of Leahill.

[7] Metal detectorists have found a number of Roman coins in the area and a skeleton was uncovered during the 1958 excavations at Leahill Turret.

Leahill Turret was part of this event, garrisoned by two volunteers, marking the 1600th anniversary of the cessation of Roman rule in Britain in AD410.

These structures were built to a standard pattern, two storeys high with the ground floor used for cooking with a movable ladder.