The valleys between the hills are crossed by the ancient aqueduct of Valens, which conveys the water brought from the mountains of the Black Sea to the several cisterns of the city. The humidity oozing through the masonry, nourishes the roots of various plants, which, trailing down, form festoons with their long tendrils, and clothe the romantic arcades, which cross the streets, with a luxuriant drapery. Almost every house stands within an area planted with jujube, judas-tree, and other fruit and flowery shrubs peculiar to the soil and climate; so that the vast mass of building covering the sides and summits of the hills, is interspersed and chequered with the many hues displayed by the leaves, fruits, and flowers in their season. Of these the judas-tree affords the predominant colour. The burst of flowers from every part of it, in spring, at times actually gives a ruddy tint to the whole aspect of the city. [Illustration: FOUNTAIN AND MARKET-PLACE OF TOPHANA.] As there is no object of consumption in life so precious to a Turk as water, so there is none which he takes such care to provide, not only for himself, but for all other animals. Before his door he always places a vessel filled with water for the dogs of the street; he excavates stones into shallow cups, to catch rain for the little birds; and wherever a stream runs, or a rill trickles, he builds a fountain for his fellow-creature, to arrest and catch the vagrant current, that not a drop of the fluid should be wasted. These small fountains are numerous, and frequently executed with care and skill. They are usually fronted or backed with a slab of marble, ornamented with Turkish sculpture, and inscribed with some sentence from the Koran, inculcating practical charity and benevolence. The beneficent man at whose expense this is done, never allows his own name to make part of the inscription. A Turk has no ostentation in his charity; his favourite proverb is, “Do good, and throw it into the sea; and if the fish do not see it, Allah will.” Among the many fountains which adorn the city, there are two on which the Turks seem to have exerted all their skill in sculpture. One in Constantinople near the Babu Hummayoun, or “the Great Gate of the Seraglio.” The other in Pera, near _Tophana_, or the “canon foundry.” They are beautiful specimens of the Arabesque, and highly decorated. That at Tophana, represented in the illustration, is particularly so. It is a square edifice with far-projecting cornices, surmounted by a balustrade along the four façades. These last are covered over with a profusion of sculpture, and every compartment, formed by the moulding, is filled with sentences from the Koran, and poetical quotations from Turkish, Persian, and Arabic authors. The following is a translation of some of the inscriptions. It was erected in 1732.