These conjectures are confirmed by the little we know both of the popular and of the official Egyptian religion. Thus we are told that the Egyptians held a festival of Isis at the time when the Nile began to rise. They believed that the goddess was then mourning for the lost Osiris， and that the tears which dropped from her eyes swelled the impetuous tide of the river. Now if Osiris was in one of his aspects a god of the corn， nothing could be more natural than that he should be mourned at midsummer. For by that time the harvest was past， the fields were bare， the river ran low， life seemed to be suspended， the corn-god was dead. At such a moment people who saw the handiwork of divine beings in all the operations of nature might well trace the swelling of the sacred stream to the tears shed by the goddess at the death of the beneficent corn-god her husband.
And the sign of the rising waters on earth was accompanied by a sign in heaven. For in the early days of Egyptian history， some three or four thousand years before the beginning of our era， the splendid star of Sirius， the brightest of all the fixed stars， appeared at dawn in the east just before sunrise about the time of the summer solstice， when the Nile begins to rise.
The Egyptians called it Sothis， and regarded it as the star of Isis， just as the Babylonians deemed the planet Venus the star of Astarte. To both peoples apparently the brilliant luminary in the morning sky seemed the goddess of life and love come to mourn her departed lover or spouse and to wake him from the dead. Hence the rising of Sirius marked the beginning of the sacred Egyptian year， and was regularly celebrated by a festival which did not shift with the shifting official year.
The cutting of the dams and the admission of the water into the canals and fields is a great event in the Egyptian year. At Cairo the operation generally takes place between the sixth and the sixteenth of August， and till lately was attended by ceremonies which deserve to be noticed， because they were probably handed down from antiquity. An ancient canal， known by the name of the Khalíj， formerly passed through the native town of Cairo. Near its entrance the canal was crossed by a dam of earth， very broad at the bottom and diminishing in breadth upwards， which used to be constructed before or soon after the Nile began to rise. In front of the dam， on the side of the river， was reared a truncated cone of earth called the 'arooseh or bride， on the top of which a little maize or millet was generally sown. This bride was commonly washed down by the rising tide a week or a fortnight before the cutting of the dam.
Tradition runs that the old custom was to deck a young virgin in gay apparel and throw her into the river as a sacrifice to obtain a plentiful inundation.
Whether that was so or not， the intention of the practice appears to have been to marry the river， conceived as a male power， to his bride the cornland， which was so soon to be fertilised by his water. The ceremony was therefore a charm to ensure the growth of the crops. In modern times money used to be thrown into the canal on this occasion， and the populace dived into the water after it. This practice also would seem to have been ancient， for Seneca tells us that at a place called the Veins of the Nile， not far from Philae， the priests used to cast money and offerings of gold into the river at a festival which apparently took place at the rising of the water.
