This Nilometer is an ancient octagon pillar of red stone in the island of Rhoda, on the sides of which graduated scales are engraved. It stands in the centre of a cistern, about twenty-five feet square, and more than that in depth. A stone staircase leads down to the bottom, and the side walls are ornamented with Cufic inscriptions beautifully cut. Of this antique column I have seen more than most people; for on the 28th of August, 1833, the water was so low that there was the greatest apprehension of a total failure of the crops, and of the consequent famine. At that time nine feet more water was wanted to ensure an average crop; much of the Indian corn had already failed; and from the Pasha in his palace to the poorest fellah in his mud hovel, all were in consternation; for in this country, where it never rains, everything depends on irrigation,--the revenues of the state, the food of the country, and the life or death of the bulk of the population.
At length the Nile rose to the desired height; and the 6th of September was fixed for the ceremony of cutting the embankment which keeps back the water from entering into the canal of the Khalidj. This canal joins the Nile near the great tower which forms the end of the aqueduct built by Saladin, and through it the water is conveyed for the irrigation of Cairo and its vicinity. One peculiarity of this city is, that several of its principal squares or open spaces are flooded during the inundation; and, in consequence of this, are called lakes, such as Birket el Fil (the Lake of the Elephant), Birket el Esbekieh, &c. Many of the principal houses are built upon the banks of the Khalidj canal, which passes through the centre of the town, and which now had the appearance of a dusty, sunken lane; and the annual admission of the water into its thirsty bed is an event looked forward to as a public holiday by all classes. Accordingly, early in the morning, men, women, and children sallied forth to the borders of the Nile, and it seemed as if no one would be left in the city. The worthy citizens of Cairo, on horses, mules, donkeys, and on foot, were seen streaming out of the gates, and making their way in the cool of the morning, all hoping to obtain places from whence they might catch a glimpse of the cutting of the embankment.