Pepys provided what Prof. Ludington called "the first tasting note of Haut-Brion". Therefore both Charles II's cellar book and Pepys' note "provide the first mention in any language of estate-named claret and are among the many proofs that Haut-Brion was created specifically for the English market." Pontac went even further in developing the renown of his wine: "By improving and "branding" a product, [...] he created and named a wine that came from a small, circumscribed area of land for the purpose of enhancing its value in the minds and on the palates of discerning English customers." The original diary of Pepys is held in the Pepys Library at Magdalene College, Cambridge while the 1660 Cellar Book of King Charles II is held by the British National Archives. In 1927, writer Dorothy L. Sayers, in her novel "Unnatural Death", had detective Lord Peter Wimsey joke about Pepys Anglicizing the wine's name (" . . . a bottle of what Pepys calls Ho Bryon"). In April 2013, the Magdalene College, Cambridge, displayed the Pepys Diary opened at the page of the Haut-Brion mention for the 350th Anniversary of this historical mention. Dr Jane Hughes lectured on Pepys and wine before the gala dinner hosted by the Cambridge University Wine Society and featuring tributes to Pepys. Prince Robert of Luxembourg then challenged wine historians and amateurs to find a new reference to Haut-Brion in history prior to 1660. In 1666, after "The Great Fire", the son François-Auguste, opened a tavern in London called "L'Enseigne de Pontac", or the "Sign of Pontac's Head", which was according to André Simon, London's first fashionable eating-house. Jonathan Swift "found the wine dear at seven shillings a flagon". By the end of the 17th century the estate amounted to of which some were under vine. The wine was often sold under the name Pontac, though since the Pontac family owned numerous wine estates that could use the name, it is often impossible to tell when a wine came from Haut-Brion. Sometimes also spelled Pontack, another Pontac estate at Blanquefort which produced white wine would also often go by this name. English philosopher John Locke, visiting Bordeaux in 1677, spoke of Haut-Brion, "...The wine of Pontac, so revered in England, is made on a little rise of ground, lieing[sic] open most to the west. It is noe thing but pure white sand, mixed with a little gravel. One