As the successive floods grow stronger and are more heavily charged with mud, the whole mass of water becomes turbid and changes colour. In eight or ten days it has turned from greyish blue to dark red, occasionally of so intense a colour as to look like newly shed blood. The "Red Nile" is not unwholesome like the "Green Nile," and the suspended mud to which it owes its suspicious appearance deprives the water of none of its freshness and lightness. It reaches its full height towards the 15th of July; but the dykes which confine it, and the barriers constructed across the mouths of canals, still prevent it from overflowing. The Nile must be considered high enough to submerge the land adequately before it is set free. The ancient Egyptians measured its height by cubits of twenty-one and a quarter inches. At fourteen cubits, they pronounced it an excellent Nile; below thirteen, or above fifteen, it was accounted insufficient or excessive, and in either case meant famine, and perhaps pestilence at hand. To this day the natives watch its advance with the same anxious eagerness; and from the 3rd of July, public criers, walking the streets of Cairo, announce each morning what progress it has made since evening. More or less authentic traditions assert that the prelude to the opening of the canals, in the time of the Pharaohs, was the solemn casting to the waters of a young girl decked as for her bridal--the "Bride of the Nile." Even after the Arab conquest, the irruption of the river into the bosom of the land was still considered as an actual marriage; the contract was drawn up by a cadi, and witnesses confirmed its consummation with the most fantastic formalities of Oriental ceremonial. It is generally between the 1st and 16th of July that it is decided to break through the dykes. When that proceeding has been solemnly accomplished in state, the flood still takes several days to fill the canals, and afterwards spreads over the low lands, advancing little by little to the very edge of the desert. Egypt is then one sheet of turbid water spreading between two lines of rock and sand, flecked with green and black spots where there are towns or where the ground rises, and divided into irregular compartments by raised roads connecting the villages. In Nubia the river attains its greatest height towards the end of August; at Cairo and in the Delta not until three weeks or a month later. For about eight days it remains stationary, and then begins to fall imperceptibly. Sometimes there is a new freshet in October, and the river again increases in height. But the rise is unsustained; once more it falls as rapidly as it rose, and by December the river has completely retired to the limits of its bed. One after another, the streams which fed it fail or dwindle. The Tacazze is lost among the sands before rejoining it, and the Blue Nile, well-nigh deprived of tributaries, is but scantily maintained by Abyssinian snows.