(17 Edward III., A.D. 1343, Letter-book F, fol. 67.) "Be it remembered that at the Hustings of Common Pleas, holden on the Monday next before the Feast of Gregory the Pope, in the 17th year of the reign of King Edward, after the Conquest, the Third, Simon Traunceys, Mayor, the Aldermen and the Commonalty, of the City of London, for the decency and cleanliness of the same city, granted upon lease to the butchers in the Parish of St. Nicholas Shambles, in London, a piece of land in the lane called 'Secollane' (sea coal), neare to the water of Flete, for the purpose of there, in such water, cleansing the entrails of beasts. And upon such piece of land the butchers aforesaid were to repair a certain quay at their charges, and to keep the same in repair; they paying yearly to the Mayor of London for the time being, at the Feast of our Lord's Nativity, one boar's head."[10] (31 Edward III., A.D. 1357, Letter-book G, fol. 72.) "Also, it is ordered, that no man shall take, or cause to be carried, any manner of rubbish, earth, gravel, or dung, from out of his stables or elsewhere, to throw, and put the same into the rivers of Thames and Flete, or into the Fosses around the walls of the City: and as to the dung that is found in the streets and lanes, the same shall be carried and taken elsewhere out of the City by carts, as heretofore; or else by the _raykers_[11] to certain spots, that the same may be put into the _dongebotes_,[12] without throwing anything into the Thames; for saving the body of the river, and preserving the quays, such as Dowegate, Quenhethe, and Castle Baynards, (and) elsewhere, for lading and unlading; as also, for avoiding the filthiness that is increasing in the water, and upon the banks of the Thames, to the great abomination and damage of the people. And, if any one shall be found doing the Contrary hereof, let him have the prison for his body, and other heavy punishment as well, at the discretion of the Mayor and of the Aldermen."[13] (7 Henry V. A.D. 1419, Journal 1, fol. 61.) "It is granted that the _risshbotes_[14] at the Flete and elsewhere in London shall be taken into the hands of the Chamberlain; and the Chamberlain shall cause all the streets to be cleansed."[15] The northern heights of London, the "ultima Thule" of men like Keats, and Shelley, abound in springs, which form the bases of several little streams, which are fed on their journey to their bourne, the Thames (to which they act as tributaries), by numerous little brooklets and rivulets, which help to swell their volume. On the northern side of the ridge which runs from Hampstead to Highgate, birth is given to the Brent, which, springing from a pond in the grounds of Sir Spencer Wells, is pent up in a large reservoir at Hendon, and finally debouches into the Thames at Brentford, where, from a little spring, which it is at starting, it becomes so far a "fleet" as to allow barges to go up some distance.