Portman Estate area remained largely residential, attracting the prosperous middle class who wanted to live near the centre of London. There were also mews for tradesmen and servants. At the southwest corner of the Estate, where Marble Arch now stands, was the Tyburn gallows, London’s principal place of public execution until 1783. Development of the area north of the Marylebone Road around Dorset Square continued after 1815, and to the North West in Lisson Green, workers’ cottages were built from 1820 to 1840. Many of the original Georgian houses north of Portman Square were redeveloped as mansion blocks, which were let on
Tyburn to the village, later joined by Park Lane (originally Tyburn Lane). In the 1230s and 1240s the village of Tyburn was held by Gilbert de Sandford, the son of John de Sandford, who had been the chamberlain to Eleanor of Aquitaine. In 1236 the city of London contracted with Sir Gilbert to draw water from Tyburn Springs, which he held, to serve as the source of the first piped water supply for the city. The water was supplied in lead pipes that ran from where Bond Street Station stands today, east of Hyde Park, down to the hamlet of Charing