It seems certain that the chalybeate wells of Hampstead were known to the Romans, but they were practically forgotten until the sixteenth century, when they were rediscovered, but little notice was taken of them until the close of the seventeenth century, when the value of their medicinal properties was recognised and the foundations were laid for the conversion of Hampstead into a fashionable health resort. It will be interesting to take a farewell look at the old-world hamlet on the eve of its transformation, which can be done with the aid of a Field Book in a manuscript volume now in the Hampstead Free Library, describing a survey made in 1680, showing that waste lands stretched on either side of the main road to London, and that there were but half a dozen houses in what are now High and Heath Streets, of which one was the King {11} of Bohemia Tavern, the site of which is occupied by one bearing the same name, that keeps green the memory, dear to the people of Protestant England, of the Elector Palatine Frederick V., who was elected king of Bohemia in 1619. There was also an inn where Jack Straw's Castle now stands, and one known as Mother Haugh's not far away. The gibbet on which a murderer was hung in chains in 1693 rose up on the west of the North End Road, and on the very summit of Mount Vernon was the mill that gave its name to Windmill Hill. Such were some of the features of Hampstead when in in 1698 the Countess of Gainsborough, on behalf of her infant son the earl, then lord of the manor, gave to the poor of the parish the six acres of land that are now known as the Well's Charity Estate, the administration of which was entrusted to fourteen trustees, who appear to have been aware from the first of the exceptional value of the chalybeate wells on the property. They were of course careful to safeguard to the people to whom they were responsible the right to drink the waters on the spot, and to carry them away for use at home at certain hours of the day, but subject to various restrictions. They leased the well to a succession of tenants, who exploited it with more or less success. The temporary booths and shelters that at first sufficed for the visitors to the well were soon supplemented by substantial buildings, and a brisk trade was done at the Flask Tavern in Flask Walk, where the waters were bottled, that was only pulled down a few years ago, {12} and has been replaced by a new inn bearing the same name.