The range of Harrogate waters was extended in 1783 when the landlord of the Crescent Inn uncovered a sulphur well in his garden. This was the first mineral well to be discovered after the award of 1778, and as its location was not on public ground, the innkeeper acquired a valuable asset which other landlords were soon to emulate. In 1790 he then discovered a chalybeate spring, the Crescent Saline, in the cellar of his house.
More springs were found in an area to the east of Ripon Road near the site of the present Royal Hall where the Chloride of Iron and Pure Chalybeates were found in 1818 and further springs were discovered in the grounds of the Crown Hotel and in Montpellier Gardens, immediately east of the Crown Hotel.