Running nearly parallel with the little Tyburn was another rivulet, which flowed through our present Park, namely, the West-bourne. This, too, rose in the high lands near Hampstead, fought its way down hill to Bayswater, where Westbourne Terrace now stands, and crossed Hyde Park, taking a southerly course near the present site of Albert Gate, where a foot-bridge was built. It passed thence through Lowndes Square and Chesham Street, finally discharging into the Thames by two mouths near the grounds of the Royal Hospital at Chelsea. The accompanying map will illustrate this description and give interest to the above details. These two little rivulets practically watered that part of the forest, while London for centuries afterwards was confined to the walled town ending at Blackfriars. Both are lost to sight to-day. They can no longer be seen above ground, although their springs help to flood our drains and keep them fresh and clean. As Dean Stanley says: “There is a quaint humour in the fact that the great arteries of our crowded streets, the vast sewers which cleanse our habitations, are fed by the lifeblood of those old and living streams; that underneath our tread the Tyburn, and the Holborn, and the Fleet, and the Wall Brook, are still pursuing their course, still ministering to the good of man.” The identical course of the Tyburn given in the Charter of King Edgar is followed by the “King’s Pond Sewer.” It will be seen that the land lying between the Tyburn and the Westbourne was practically an island. It was known as the Manor of Eia—the Ey-land—and included all the district between Westminster and Chelsea to the extent of some 890 acres. Hence in the words Hyde and Hay may be seen the corruption of the Anglo-Saxon “ey” or “ei,” an island; in Ty-bourne, of “Ey-bourne.” Anyone familiar with Cockney dialect will easily account for the “H” in _Hyde_ and _Hay_. The “T” in Ty-bourne is probably an abbreviation of the Saxon word “aet,” the road near; the word thus signifying “the-road-near-the-island-stream.” This Manor of Eia was, after the completion of Domesday Book (1086), in accordance with the custom of Feudal times, divided into three Manors, namely, Neyt, Eubery, and Hide, and here again is found the corruption of the word “ey” in “Neyt” and “Eubery” (Ebury). There seems to be some doubt as to the origin of Knightsbridge, but it most probably took its name from the bridge over the West-bourne, near the site of the Albert Gate, which apparently was held as a military post, to control the outlaws who infested the morass to the south.