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
Execution of the Báb the barracks square to review the events he witnessed. Zaímu'd-Dawlih recounted his father's version in a book, "Miftáh-i-Bábu'l-Abváb ya Taríkh-i-Báb va Bahá" (Key to the Gate of Gates, or the History of the Báb and Bahá), published about A.H. 1310 (about 1896). The work is a polemically anti-Bahá'í book. But the account of the execution (which is lengthy) includes the following details: Execution of the Báb On the morning of July 9, 1850 in Tabriz, a young Persian merchant known as the Báb, at the age of thirty, was charged with apostasy and shot by order of the Prime Minister