C. Corners where the water runs away to the fountains in the squares and streets, and to the gardens, in and without the city. Around are the ruins and backs of houses, walls, and gardens, the palms alone being visible, looking very fresh and gracefully picturesque, near this source of life. After this went to see the _Water-Watch_[28], which is placed in one corner of the Souk. This is constructed upon the same principle as the hour-glass, but it is small, and requires to be emptied twenty-four times to complete the hour. In fact, it is only a small earthen pot or jar with a hole in the bottom of certain dimensions, and when filled with water, and the water has emptied itself, running out twenty-four times, the hour is completed. Some gardens require the stream, which the _Water-Watch_ measures the time of the running of, an hour, others only half an hour, and others two or more hours, according to their size and distance from the source. The inhabitants pay Government so much per hour for the running of the stream into their gardens; but some have an hereditary possession in a certain quantity of the time of the stream's running. Of this they are naturally very proud. For ordinary household purposes the water is given without cost. There are two or three places in the town where a small water-watch is kept, but that in the Souk is the principal one. I have thus entered into particulars, for the obvious reason that, "water is the liquid gold in these thirsty regions." In Southern Algeria, the oasis of El-Agouat, each landed proprietor has the prescriptive right of an hour or two hours of the running of the water, according to the title deeds of the estate. The time is measured with an hour-glass (of sand) held by the officer who distributes the water, and who opens and shuts the conduit of irrigation at the time fixed. Many other oases have the same system.