Where was the Cavendish experiment conducted that first measured Earth’s density?

Henry Cavendish performed the famous torsion-balance experiment in his home laboratory at Clapham Common, then a village outside London, in 1797–1798. The apparatus let him detect the extremely small gravitational pull between large and small lead balls. Although Cavendish described it as a measurement of Earth’s density, the result is now understood as one of the earliest accurate measurements of the gravitational constant. The experiment is a landmark in the history of Newtonian gravity.