The source of Hargrove's information in the above quotation is, without
doubt, the summary of "Spadacrene Anglica," published by Dr. Short in
1734 in his History of Mineral waters.[13] The summary by Short of
Chapter 6 of "Spadacrene Anglica" is as follows:--

"This fifth Spaw is a Mile and half from Knaresburgh, up a very
gentle ascent, near Harrigate, has much the same Situation as the
foresaid Spaws in Germany. It was discovered first about fifty
years ago, by one Mr. William Slingsby, who had travelled in
Germany in his younger Years, seen, and been acquainted with
theirs; and as he was of an ancient Family near the place, so he
had fine Parts and was a capable Judge. He lived some time at a
Grange-House near it; then removed to Bilton-Park, where he spent
the rest of his Days. He, using this Water yearly, found it exactly
like the German Spaw. He made several Tryals of it, then walled it
about, and paved it in the bottom with two large Stone-flags, with
a Hole in their sides for the free Access of the Water, which
springs up only at the bottom, through a Chink or Cranny left on
purpose. Its current is always near the same, and is about the
quantity of the Sauvenir, to which Mr. Slingsby thought it
preferable being more brisk and lively, fuller of Mineral Spirits,
of speedier Operation; he found much benefit by it. Dr. Tim.
Bright, about thirty years ago, first gave it the name of the
English Spaw: Having spent some time at those in Germany, he was
Judge of both; and had so good an Opinion of ours, that he sent
many Patients hither yearly, and every Summer drank the Waters
himself. And Dr. Anthony Hunter, late Physician at
Newark-upon-Trent, often chided us Physicians in York, for not
writing upon it, and deservedly setting it upon the Wings of Fame."