The number of springs worthy the observation of physicians has largely increased and the relative importance of the five mentioned has altered considerably since Deane wrote. But in 1626, The Tuewhit Well, or The English Spaw, was regarded as the most worthy of fame. This well, according to the later writers, was discovered by Captain (afterwards Sir) William Slingsby:--in Chapter 6 of "Spadacrene Anglica," however, a Mr. William Slingsby is given as the discoverer. "The first discoverer of it to have any medicinall quality (so far forth as I can learn), was one Mr. William Slingesby, a Gentleman of many good parts, of an ancient and worthy Family neere thereby: who having travelled in his younger time, was throughly acquainted with the taste, use, and faculties of the two Spaw fountaines. In his latter time, about 55 yeeres agoe it was his good fortune to live for a little while at a grange house very neare to this fountaine, and afterwards in Bilton Parke all his life long." From this it appears that the discovery was made by Mr. William Slingsby in his later years, about the year 1571, but if the Mr. William Slingsby here referred to was Sir William Slingsby he would have been a youth of some 8 or 9 years in 1571. Secondly, one would judge from the text that the Mr. William Slingsby referred to by the writer was dead at the time that he wrote, namely 1626, whereas, as a matter of fact, Sir William Slingsby was alive until the year 1634. Thirdly, it is impossible to conceive that Edmund Deane would refer to Sir William Slingsby as Mr. William Slingsby, seeing that the former was knighted in 1603, or 23 years prior to the publication of Deane's work. It is therefore abundantly clear that Sir William Slingsby--a very gallant gentleman--has no claim to the fame which history has insisted upon according him. The fact is that the Mr. William Slingsby referred to[11] was the fourth son of Thomas Slingsby of Scriven, who married Joan, daughter of Sir John Mallory of Studley, and who had a family of six sons and four daughters. The name of the eldest son was Francis, and, as just mentioned, William was the fourth son. Sir William Slingsby was the seventh son of Francis and the nephew therefore of Mr. William Slingsby. Mr. William Slingsby was buried at Knaresborough on the 8th of Oct., 1606, but the date of his birth does not seem to have been recorded. His elder brother, Francis, died in 1600 at the age of 78, so that he was born in 1522. It is not unreasonable to suppose that William, his brother, one of a large family, was born between the years 1525 and 1527. He would therefore be somewhere between 44 and 46 years of age, when he discovered the medicinal qualities of the Tuewhit Well, which equally accords with Deane's statement that in his younger days he had travelled in Germany. So far as I can trace, Hargrove[12] is the first author to confuse the uncle and the nephew. He writes that the well