What did William Roy blue plaque do at 10 Argyll Street?

The Story

# William Roy at 10 Argyll Street Standing before this elegant Georgian townhouse in the heart of Westminster, you're at the address where Major-General William Roy established his residence during the latter decades of the eighteenth century, a period when he was transforming British mapmaking from amateur pursuit to scientific precision. It was from this very address on Argyll Street that Roy directed the ambitious trigonometric survey of Great Britain, a project that would revolutionise how the nation understood and documented its own geography—work that demanded he live close to the corridors of power to secure funding and political support for his vision. Within these walls, he refined the mathematical methods and astronomical observations that would become the foundation of the Ordnance Survey, Britain's first systematic national mapping enterprise, converting his rooms into both residence and headquarters for a undertaking of unprecedented national scope. This location matters not merely as a home, but as the nerve centre from which Roy orchestrated the reinvention of British cartography, making what might seem like an ordinary Westminster address actually the birthplace of the precise geographical knowledge upon which modern Britain would be built.