Before the springs, Hampstead was a village of no particular consequence. It sat on its hill four miles north of London, surrounded by heath and farmland, its economy sustained by the modest industries that characterised rural Middlesex: a little dairying, some brickmaking, the cultivation of crops on the heavy clay soil that covered the lower slopes. The manor was old, the church was medieval, and the population numbered perhaps a few hundred souls who lived and died without troubling the broader narrative of English history. There was nothing in the Hampstead of the 1690s to suggest that within a decade it would become one of the most fashionable destinations within reach of the capital, its lanes crowded with carriages, its inns overflowing with visitors, and its economy transformed by a substance as simple and as unremarkable as water.
The water in question was chalybeate, meaning it contained dissolved iron salts that gave it a distinctive rusty colour, a metallic taste, and, according to the medical wisdom of the time, remarkable therapeutic properties. Chalybeate springs had been known and exploited across Europe for centuries. Spa, the Belgian town that gave its name to the entire phenomenon of therapeutic bathing, owed its fame to iron-rich waters. Tunbridge Wells, in Kent, had established itself as a fashionable resort on the strength of a chalybeate spring discovered in 1606. When a similar spring was identified on the edge of Hampstead Heath around 1698, the villagers who recognised its potential were following a well-established commercial model. What they could not have anticipated was the completeness with which this discovery would transform every aspect of their community.
The Discovery and Early Exploitation
The precise circumstances of the spring's discovery are, like many foundational stories, obscured by time and competing claims. The most widely accepted account credits Susanna Noel, a local woman of some social standing, with identifying the spring's properties and promoting its use. The spring itself emerged on the lower slopes of the Heath, in an area that would come to be known as Well Walk, the iron-rich water seeping through the Bagshot Sand geological formation that underlies much of Hampstead's higher ground. The geological conditions were ideal: rainwater percolating through the sandy, iron-bearing strata picked up dissolved ferrous salts before emerging at the surface as a clear, cold, faintly tinted stream with the characteristic metallic flavour of chalybeate water.
The medical profession of the late seventeenth century was enthusiastic about mineral waters in general and chalybeate waters in particular. Iron was understood to strengthen the blood, and chalybeate springs were prescribed for a bewildering range of conditions including anaemia, digestive complaints, nervous disorders, infertility, and the catch-all malaise that the Georgians referred to as vapours. The endorsement of physicians was essential to the commercial success of any spa, and the Hampstead spring was quickly analysed, tested, and declared beneficial by several prominent London doctors. Their testimonials, published as pamphlets and circulated among the fashionable and the hypochondriacal, brought the first wave of visitors to the village.
The earliest infrastructure for exploiting the spring was rudimentary. A simple wellhead was constructed, and the water was made available to visitors who could drink it on the spot or purchase it in small glass flasks to take away. The price, typically threepence per flask, was modest enough to attract a broad clientele while generating a steady income for those involved in the trade. Donkeys were employed to carry the heavy glass vessels up the steep lanes from the spring to the High Street, where they were sold to visitors arriving from London. This donkey trade, charming in retrospect but laborious in practice, became one of the characteristic sights of early eighteenth-century Hampstead, and the animals' hooves wore grooves in the cobblestones that survived for generations.
The Well Walk Pump Room and Assembly Rooms
As the number of visitors grew, the need for more substantial facilities became apparent. The ad hoc arrangements of the earliest years gave way to a more organised infrastructure, centred on the pump room that was constructed on Well Walk to dispense the water in a setting appropriate to the fashionable clientele it was intended to serve. The pump room was a modest but dignified building, equipped with a pump that drew water from the spring and dispensed it into glasses and flasks at a counter. Attendants managed the distribution, and a small charge was levied for each serving. The room provided shelter from the weather, a place to sit while drinking the recommended quantity of water, and a social space where visitors could meet, converse, and be seen.
The pump room was complemented by the Great Room, an assembly room that served as the social centre of the spa. Assembly rooms were essential components of any self-respecting Georgian spa town, providing spaces for dancing, card playing, concerts, and the elaborate social rituals that defined polite society. Hampstead's Great Room, while smaller than its counterparts in Bath or Tunbridge Wells, served the same functions and attracted a similarly mixed clientele. Evening assemblies were held regularly during the season, drawing visitors and residents alike into a programme of entertainment that transformed the quiet village into something approaching a resort.
The Great Room's programme reflected the tastes and pretensions of its audience. Concerts of vocal and instrumental music were a regular feature, as were balls at which the latest dances were performed with the formal precision that Georgian etiquette demanded. Card tables were available for those who preferred gambling to dancing, and the room also hosted lectures, recitations, and other educational entertainments that appealed to the more intellectually inclined visitors. The social dynamics of the Great Room were carefully managed by a Master of Ceremonies, an official whose duty was to enforce the rules of precedence, resolve disputes over seating and introductions, and ensure that the evening's entertainment proceeded with appropriate decorum.
The physical remains of the pump room and assembly rooms have largely disappeared, absorbed into the later development of Well Walk and its surrounding streets. But the layout of the area still reflects the spatial logic of the spa era, with Well Walk itself following the route that led from the High Street to the spring, and the buildings that line it occupying plots that were first developed to serve the needs of the spa's visitors. The architectural historian who walks Well Walk today is walking through a palimpsest, a streetscape that has been overwritten many times but that still preserves, in its orientation and proportions, the ghost of the Georgian resort that preceded the present-day residential neighbourhood.
The Flask Sellers and the Water Trade
The sale of chalybeate water in glass flasks was the commercial engine that drove Hampstead's spa economy. The trade was simple in concept but surprisingly complex in execution, involving the procurement and manufacture of glass vessels, the management of the spring itself, the employment of labourers and donkeys to transport the water, and the retail operation that placed the filled flasks in the hands of customers.
The flasks themselves were typically small glass bottles of about half a pint capacity, sealed with cork and sometimes bearing a rudimentary label identifying their contents and origin. Glass manufacture in the early eighteenth century was a relatively expensive process, and the cost of the flask represented a significant proportion of the threepence charged for each serving. Some enterprising sellers offered the water in earthenware vessels at a lower price, though the glass flask remained the premium option and the one most commonly associated with the trade. The Flask pub on Flask Walk, which takes its name from this commerce, served as a principal retail outlet, and the lane itself became synonymous with the water trade.
The logistics of the flask trade were shaped by Hampstead's topography. The spring was located on Well Walk, below the High Street, while the main concentration of visitors arrived at the top of the village via the Hampstead Road from London. The steep gradient between these two points made the transport of filled flasks a physical challenge, and the donkeys that carried them became as much a part of Hampstead's identity as the water itself. These animals, typically small and sturdy, were loaded with panniers containing dozens of filled flasks and led up the hill by their handlers, creating a daily procession that fascinated visitors and became a popular subject for artists and printmakers. The donkey handlers were a distinct occupational group within the village, their trade seasonal and physically demanding but sufficiently profitable to sustain a number of families through the spa years.
The water itself was also sold beyond Hampstead. Flasks of chalybeate water were distributed to apothecaries and physicians in London, who prescribed them to patients unable or unwilling to make the journey to the village. This wholesale trade extended the economic reach of the spring beyond the immediate locality, creating a distribution network that brought Hampstead water to customers across the capital. The volumes involved were not large by modern standards, but the trade represented a significant source of income for a village of Hampstead's size, and its profits contributed to the prosperity that enabled the building boom of the early eighteenth century.
Competition with Other Spa Towns
Hampstead's chalybeate spring entered a competitive market. By the time of its discovery, England already possessed several well-established spa towns, each with its own infrastructure, clientele, and reputation. The most formidable competitor was Bath, which under the leadership of Beau Nash had transformed itself into the supreme social resort of the English-speaking world, its Roman baths, its Palladian architecture, and its elaborate social rituals setting a standard that no rival could match. Tunbridge Wells, closer to London and similarly based on chalybeate waters, offered a more directly comparable experience. Epsom, with its purgative mineral springs, attracted visitors in large numbers during the summer season. Even within London itself, spas such as Sadler's Wells and Bagnigge Wells competed for the custom of city-dwellers seeking therapeutic recreation.
Hampstead's advantages in this competition were its proximity to London, the quality of its air, and the beauty of its setting. A visitor could leave the city in the morning, take the waters at Well Walk, enjoy the Great Room in the evening, and return home the same night, a convenience that Bath and Tunbridge Wells could not offer. The Heath, with its open expanses and commanding views, provided opportunities for walking, riding, and other outdoor diversions that complemented the indoor programme of the assembly rooms. And the village itself, perched on its hill above the smoky city, offered an experience of rural tranquillity that was all the more valued for being so easily accessible.
These advantages were offset by significant limitations. Hampstead lacked the scale, the grandeur, and the social cachet of Bath, which attracted royalty, aristocracy, and the wealthiest members of the gentry in numbers that Hampstead could not hope to match. The pump room and assembly rooms were modest compared with their equivalents in the more established resorts. The village's accommodation was limited, and the steep approach roads made travel uncomfortable, particularly in wet weather. Most significantly, Hampstead's proximity to London, while an advantage for day visitors, was a disadvantage for those seeking a genuine change of scene; it was too close to the city to provide the sense of escape that a true spa holiday required.
The result was that Hampstead occupied a particular niche in the hierarchy of English spa towns. It was a convenient resort for Londoners who wanted the spa experience without the expense and inconvenience of a journey to Bath or Tunbridge Wells, but it never aspired to compete with those resorts at the highest level. Its clientele was drawn predominantly from the middle ranks of London society, professional men and merchants rather than aristocrats, a demographic that would prove crucial to the village's subsequent development as a residential suburb for the capital's prosperous bourgeoisie.
Impact on Property Development
The spa transformed Hampstead's built environment as thoroughly as it transformed its economy. Before the discovery of the spring, the village consisted of a church, a manor house, a scattering of farmsteads, and a handful of cottages clustered along what is now the High Street. Within a generation of the spring's exploitation, this modest settlement had been augmented by a substantial number of new buildings, including lodging houses, shops, taverns, and private residences, many of considerable architectural quality. The spa created both the demand for new building and the capital to finance it, driving a construction boom that laid the foundations for the Hampstead we know today.
The demand came primarily from visitors who wished to stay in the village during the season rather than make the daily journey from London. Lodging houses sprang up along the principal streets, offering accommodation that ranged from the basic to the relatively luxurious. Some visitors, finding the village to their liking, commissioned the construction of permanent residences, creating the nucleus of the fine Georgian housing stock that remains one of Hampstead's defining characteristics. The streets around Well Walk and the lower part of the High Street developed rapidly during the first decades of the eighteenth century, their building plots carved from the fields and orchards that had previously occupied the village's periphery.
The capital came from the spa trade itself and from the broader economic stimulus that the influx of visitors provided. Shopkeepers prospered, tavern owners expanded their premises, and landowners found that their fields were worth far more as building plots than as agricultural land. The manor of Hampstead, which controlled much of the land around the village, benefited enormously from the increase in land values that the spa brought about, and the revenues from ground rents and leases financed improvements to the manorial estate that further enhanced the village's attractiveness.
The architectural character of the buildings erected during the spa era reflected the tastes of the period and the aspirations of their builders. The best houses were designed in the restrained classical style that dominated English domestic architecture during the early eighteenth century, with symmetrical facades, sash windows, and carefully proportioned rooms that spoke of their owners' wealth and cultivation. These houses were built of brick, much of it produced locally from the clay deposits on the Heath, and their quality of construction has ensured that many survive today, forming the core of Hampstead's conservation area. Even the more modest buildings of the period, the lodging houses and shops that catered to the ordinary visitor, displayed a level of architectural ambition that reflected the prosperity the spa had brought to the village.
Decline of the Spa
The chalybeate economy did not last. By the middle of the eighteenth century, Hampstead's spa was in decline, its visitors drawn away by the superior attractions of competing resorts and its medical reputation undermined by the changing fashions of therapeutic practice. The decline was gradual rather than sudden, a slow fading of custom and confidence that left the village's spa infrastructure intact but increasingly underused.
Several factors contributed to the spa's decline. The most important was the rise of sea bathing as a therapeutic practice, a fashion that diverted the leisure traffic of London's middle classes from inland spas to the emerging coastal resorts of Brighton, Margate, and Weymouth. The medical profession, always susceptible to fashion, increasingly endorsed sea water and sea air as superior to mineral springs for the treatment of the ailments that had previously been the spa's stock in trade. Hampstead, manifestly unable to offer a beach or a sea breeze, found itself at a competitive disadvantage that no amount of marketing could overcome.
The spa's reputation also suffered from the behaviour of some of its patrons. The assembly rooms attracted not only the respectable middle classes but also a rougher crowd of gamblers, adventurers, and women of dubious reputation, and the social atmosphere of the Great Room deteriorated as the more genteel visitors stayed away. Daniel Defoe, visiting Hampstead in the 1720s, noted with disapproval the mixed quality of the company at the wells, and his comments reflect a broader perception that Hampstead's spa had lost the social exclusivity that was essential to its appeal. The village's proximity to London, which had once been its principal advantage, now worked against it, making it too easy for undesirable elements to reach.
By the 1770s, the pump room was in disrepair and the Great Room had been converted to other uses. The flask sellers had disappeared, the donkey trains no longer climbed the hill, and the chalybeate spring flowed largely unregarded. The spa era was over, and Hampstead might have lapsed back into the obscurity from which the spring had rescued it. But the transformation the spa had wrought was too profound to be reversed. The buildings it had financed, the roads it had improved, the reputation it had established: all of these survived the spa's decline and provided the foundation for Hampstead's next incarnation as a residential suburb for London's intellectual and professional elite.
Legacy in Streets and Stones
The chalybeate economy lasted barely seventy years, but its legacy is written into every street, every building, and every institution in Hampstead. Well Walk still follows the path that led visitors from the High Street to the spring. Flask Walk still bears the name of the vessels in which the water was sold. The Flask pub still serves drinks at the spot where chalybeate flasks were once retailed. The fine Georgian houses that line the village's streets were built with money generated by the spa trade. The very character of Hampstead as a distinctive community within London, cultured, prosperous, and self-consciously separate from the city below, has its roots in the social dynamics that the spa established.
The spring itself still flows. It emerges in a small fountain on Well Walk, a modest stone structure that bears an inscription commemorating the chalybeate waters and their role in the village's history. The water still carries its load of dissolved iron, still tastes of rust and earth, still stains the stone a faint orange where it trickles from the spout. Passers-by occasionally stop to read the inscription or to taste the water, but most hurry past without a glance, their attention absorbed by the concerns of the present. The spring does not demand attention. It simply persists, a geological fact that briefly became an economic engine and then reverted to being a curiosity, its significance preserved in the street names and building stock of the village it transformed.
For those who work with Hampstead's historic buildings, the chalybeate economy provides essential context. The houses of Well Walk, Flask Walk, and the surrounding streets were not built in isolation; they were products of a specific economic moment, responses to a particular set of demands and opportunities. Understanding the spa era helps to explain why these buildings look the way they do, why they are positioned where they are, and why they exhibit the particular combination of modesty and ambition that characterises the best of Hampstead's Georgian architecture. The chalybeate economy is the hidden foundation on which modern Hampstead stands, as invisible and as essential as the geological strata from which the spring itself emerges.
*Published in the Hampstead Renovations Heritage Collection — exploring the architecture, history, and stories of London's most remarkable neighbourhoods.*