The HTH slideway design is also seen in the slide-rest of a beautifully constructed triangular-bed lathe, circa 1810-1815, preserved in the Bridwell Museum, Norwich. Attributed to Johnson Jex, a Norfolk blacksmith the lathe was used to turn clock parts. The Jex is mentioned (p.28) in Steeds' 'A History of Machine Tools 1700-1910',  where, because the unusual ways were carried on a sub-bed, Steeds suggests they may be a later addition.