After marrying Elizabeth Broad, in 1582 William Slingsby (uncle of Sir William Slingsby) took his new wife on a Grand Tour of Europe, returning in 1594. In 1596 Slingsby discovered that water from the Stray, a common in Harrogate, possessed similar properties to that at Spa in Belgium. He named the well "Tewit", after a local word for peewit or lapwing, a bird which still frequently flocks on the Stray.
Tewit Well saw fewer visitors than the wells in Low Harrogate, or even St John's Well in High Harrogate, because of its distance from Victorian hotels and lodging houses. In 1842 the structure enclosing the Royal Pump Room, which sits over the Old Sulphur Well, was replaced by a new structure designed by Isaac Shutt for the Improvement Commissioners. The old structure was then moved to Tewit Well.
Local youth brass band 'The Tewit Youth Band' is named after this landmark.
- Deane, Edmund (1922). Rutherford, James; Butler, Alex (eds.). "Spadacrene Anglica or The English Spa Fountain". SPADACRENE ANGLICA. or The English Spa Fountain. John Wright & Sons. p. 9. Retrieved 26 March 2015.
- Historic England. "ROYAL PUMP ROOM MUSEUM (1149478)". National Heritage List for England. Retrieved 26 March 2015.