There are various other grottoes on the acclivity of the hill, meant to keep alive the remembrance of certain occurrences which are either mentioned in the gospel, or have been transmitted to the present age by oral tradition. Among these is one which is supposed to be the scene of the agony and the bloody sweat; a second, that marks the place where St. Peter and the two sons of Zebedee fell asleep when their Master retired to pray; and a third, indicating the spot whereon Judas betrayed the Son of Man with a kiss. Here also is pointed out the rock from which our Saviour predicted the sack of Jerusalem and the destruction of the Temple,--that dreadful visitation, of which the traces are still most visible both within and around the walls. The curious pilgrim is further edified by the sight of a cavern where the apostles were taught the Lord's Prayer; and of another where the same individuals at a later period met together to compose their Creed. On the principal top of the Mount of Olives,--for the elevated ground presents three separate summits,--are a mosque and the remains of a church. The former is distinguished by a lofty minaret which commands an extensive prospect; but the latter is esteemed more remarkable, as containing the piece of rock imprinted with the mark of our Saviour's foot while in the act of ascension. But the view of the venerable metropolis itself, which stretches out its lance and sacred enclosures under the eye of the traveller, is still more interesting than the recapitulation of ambiguous relics. It occupies an irregular square of about two miles and a half in circumference. Eusebius gave a measurement of twenty-seven stadia, amounting to nearly a mile more than its present dimensions; a difference which can easily be explained, by adverting to the alterations made on the line of fortifications by the Saracens and Turks, especially on the north-west and western extremities of the town. Its shortest apparent side is that which faces the east, and in this is the supposed gate of the ancient Temple, shut up by the Mussulmans from a superstitious motive, and the small projecting stone on which their prophet is to sit when he shall judge the world assembled in the vale below. The southern side is exceedingly irregular, taking quite a zigzag direction; the south-western entrance being terminated by a mosque built over the supposed sepulchre of David, on the elevation of Mount Zion. The form and exact direction of the western and northern walls are not distinctly seen from the position now assumed; but every part of them appears to be a modern work, and executed at the same time. They are flanked at certain distances by square towers, and have battlements all along their summits, with loopholes for arrows or musketry close to the top. Their height is about fifty feet, but they are not surrounded by a ditch. The northern wall runs over ground which declines slightly outward;