St. Thomas dam and catchment near Old Pira drew a pond label on the 1804 Robertson map

A creator who documents Jamaica’s historic sites began with an odd, almost geometric patch on satellite pictures, then rolled Google’s archived aerial frames year by year from 2006 onward until the outline looked deliberately engineered rather than natural. Historical cartography added a puzzle: on James Robertson’s 1804 map the same ground appears marked as a pond, which did not line up with what modern imagery suggested.

Driving New Pira Road toward Old Pira, he aimed to show listeners a windmill tower, nearby fortifications, and a very large dam whose scale is easy to miss from the car. After earlier errands around Morant Bay he followed Hampton Court Road guidance, parked where the lane was too narrow to film safely, and walked in along repeated sections of high rubble wall. On site he described the structure as likely the biggest dam in St. Thomas and noted it does not appear on the 1804 sheet beyond the “pond” symbol, leaving written sources thin.

Along the embankment he met a longtime resident who said he was born in Manchester but has lived many years beside the water. The man sketched how rainfall off the surrounding hills feeds a semicircular catchment that once supplied the Stokes great house, with an overflow works higher up and a disused concrete canal leading toward a gully. He recalled depth greater than a nearby coconut palm, turtles and fish in the pool, flooding that has crossed the road, and a major outlet failure in the 1970s that prompted authorities to cut the dam to protect the road and nearby housing. He distinguished this reservoir from other downstream waterworks tied to banana-era infrastructure and spoke cautiously about local crocodile stories, saying he had not seen one there himself.

The host then climbed to Stokes Great House, a fortified plantation complex the Jamaica National Heritage Trust listed as a national monument on 7 April 2016. On-site interpretation tied the house to some of the earliest English settlement waves in the parish after the 1655 English seizure of Jamaica, including Governor Luke Stokes’s ill-fated Stokesfield venture of December 1656 and the later move of survivors to the Stokes area where descendants raised the fortified dwelling thought to date from the early eighteenth century. Gun loops, thick masonry, and a partly preserved cellar illustrate its military design, while signage credits researcher Jenny Gem’s parish history for much of the narrative.

Walking the ruin he speculated that an underground cell might lie near stepped stonework he could not fully enter, stressed the need for professional archaeology rather than amateur digging, and linked the visible hilltop wall line visually to the catchment below. He conceded the map’s “pond” entry may reflect surveyors’ uncertainty about authorship or later damming, mirroring how little formal documentation he could find on the earthwork itself.