Advertisements in the London press, notably one in the _Postman_ for 20th April 1700, reflect the efforts made by the lessees of the well to attract custom, and prove that the waters were sold in various parts of the city at the rate of 3d. per flask, and that the messengers who fetched it from the well were expected to return the flasks daily. The public buildings which gathered about the famous chalybeate springs included a long room in which balls and other entertainments were given, a pump-room where the waters were dispensed, a public-house for the supply of less innocuous drinks, a place of worship known as Sion Chapel, which as time went on became a kind of Gretna Green, for any one could be married in it for five shillings; raffling and other shops, stables, and coach-houses. Gardens, with an extensive bowling-green, were laid out, and in fine weather open-air concerts were given; in a word, no pains were spared to attract the _beau monde_. A new era now began for Hampstead, for it became the fashion for London doctors to recommend the drinking of the waters on the spot. Novelists, including Fanny Burney and Samuel Richardson, laid the scenes of some of their most exciting episodes at the spa, and on every side stately mansions, standing in their own grounds, rose up for the wealthy patrons who elected to have private residences at Hampstead. What is still known as Well Walk, and was then a beautiful grove, was the favourite promenade of the patients {13} who came to take the waters, and some of the later buildings of the spa are still standing, including the long room, that is now a private residence, after going through many vicissitudes, it having at one time served as a chapel, and at another as a barrack.