The principle, says Dr. Sharpe, of each man being responsible for the behaviour of his neighbour, which Alfred established, was carried a step further in London under Athelstane in the formation of Peace Gilds, the members of which were to meet once a month at an ale-drinking in their Gildhall.[196] Similar "Gild ale-drinkings" are spoken of in the _Heimskringla_, and we are there told in regard to the establishment of a "Great Gild," that before it there were "turn-about drinkings." All this goes together perfectly with what Giraldus says of the Guildhall of London being named from the fellowship drinkings there. He who drank to any one, Geoffrey of Monmouth tells us, said, "Wacht heil"; and he that pledged him answered, "Drinc heil." * * * * * _London Stone._--The first mayor of London (from 1191) was, as the Chronicle of the Mayors and Sheriffs tells us, Henry FitzEylwin of Londene-stone. An old marginal note in the _Liber Trinitatis_ says that "Leovistan was the father of Alwin the father of Henry the Mayor, whose first charter is in the priory of Tortingtone."[197] The association of London Stone with city history probably rests in great part on the fact of the mayor's residence having been near to it. Thomas Stopleton traces, in an introduction to the _Liber de Antiquis Legibus_,[198] the property and descendants of FitzAlwin. The town house of the mayor was just to the north of St. Swithin's Church, which was attached to the property. It was bequeathed to Tortington Priory by Robert Aquillon, son of the first mayor's grand-daughter. In Dr. Sharpe's _Calendar of Wills_ it appears that Sir Robert Aguylun left his "mansione" in St. Swithin's parish, together with the patronage of the church, to Tortington Priory in 1285. At the Dissolution it was granted to the Earl of Oxford. Stow says that Tortington Inn, Oxford Place, by London Stone, was on the north side of St. Swithin's Church and churchyard, with a fair garden to the west running down to Walbrook. It was "a fair and large builded house sometime pertaining to the prior of Tortington, since to the earls of Oxford, and now to Sir John Hart, Alderman." Munday adds, "_now_ to Master Humphrey Smith, Alderman." At this point I visited Oxford Place and St. Swithin's Lane, and it seemed evident that the Salters' Hall stood on the site of Tortington Inn. Further, on turning to Herbert's _History of the Companies_, I found that the Salters' Company purchased of Captain George Smith in 1641 the town inn of the priors of Tortington by the description of "the great house called London Stone, or Oxford House." The chain of evidence for the site of FitzAlwin's house thus seems complete. The mysterious monument, London Stone, now represented by a small rude fragment preserved a few yards away from its original site, has probably borne its present name for a millenium, and its mere name shows it to have had some institutional importance.