Amenemhat, having reigned as sole king for twenty years, was induced to raise his eldest son, Usurtasen, to the royal dignity, and associate him with himself in the government of the empire. Usurtasen was a prince of much promise, He "brought prosperity to the affairs of his father. He was, as a god, without fears; before him was never one like to him. Most skilful in affairs, beneficent in his mandates, both in his going out and in his coming in he made Egypt flourish." His courage and his warlike capacity were great. Already, in the lifetime of his father, he had distinguished himself in combats with the Petti and the Sakti. When he was settled upon the throne, he made war upon the Cushite tribes who bordered Egypt upon the south, employing the services of a general named Ameni, but also taking a part personally in the campaign. The Cushites or Ethiopians, who in later times became such dangerous neighbours to Egypt, were at this early period weak and insignificant. After the king had made his expedition, Ameni was able with a mere handful of four hundred troops to penetrate into their country, to "conduct the golden treasures" which it contained to the presence of his master, and to capture and carry off a herd of three thousand cattle. It was through his sculptures and his architectural works that the first Usurtasen made himself chiefly conspicuous. Thebes, Abydos, Heliopolis or On, the Fayoum and the Delta, were equally the scenes of his constructive activity, and still show traces of his presence. At Thebes, he carried to its completion the cell, or _naos_, of the great temple of Ammon, in later times the innermost sanctuary of the building, and reckoned so sacred, that when Thothmes III. rebuilt and enlarged the entire edifice he reproduced the structure of Usurtasen, unchanged in form, and merely turned from limestone into granite. At Abydos and other cities of Middle Egypt, he constructed temples adorned with sculptures, inscriptions, and colossal statues. At Tanis, he set up his own statue, exhibiting himself as seated upon his throne. In the Fayoum he erected an obelisk forty-one feet high to the honour of Ammon, Phthah, and Mentu, which now lies prone upon the ground near the Arab village of Begig. Indications of his ubiquitous activity are found also at the Wady Magharah, in the Sinaitic peninsula, and at Wady Haifa in Nubia, a little above the Second Cataract; but his grandest and most elaborate work was his construction of the great temple of the Sun at Heliopolis, and his best memorial is that tall finger pointing to the sky which greets the traveller approaching Egypt from the east as the first sample of its strange and mystic wonders. This temple the king began in his third year. After a consultation with his lords and counsellors, he issued the solemn decree: "It is determined to execute the work; his majesty chooses to have it made. Let the superintendent