The Anglo-Egyptian Sudan has, in recent years, attracted an ever-growing volume of research. In part, this may be attributed to the easier access to archival sources, both in England and—to a lesser extent—in the Nile Valley. In addition, there has evolved an increasing interest in bilateral relations between Egypt and the Sudan, prompted in part by the political outlook of Presidents Sadat and Numayri, and even more important, by the apparent decline in the Nile waters, especially in the 1980s. The Integration Charter {takamut), first announced by Presidents. Sadat and Numayri in 1974 and signed by Egypt and the Sudan in 1981, sought to establish co-operation, in a wide variety of spheres, which would—so it was hoped—ultimately lead to unity. These anticipations failed to materialize following the chatige of regime in the Sudan in 1985, and seem even less realistic under the present Sudanese fundamentalist dictatorship.