It might be a good idea to go over what's going on.
Overall, your quest is to locate Roger Carlyle, a playboy, on behalf of his sister Erica. He was supposedly killed on a vacation to Kenya whilst on an expedition to Egypt (the "Carlyle Expedition"). Your friend and murdered journalist Jackson Elias believed Roger was still alive because he met Roger's bodyguard in Kenya.
I'm not going to go into all the ins and out. There are various summaries in the Clues thread:
link to a message in this game
Right now, the important things are as follows:
1) You are about to go interview "Nyiti al-Wasti" in the small Nile Delta village where he lives. Nyiti rescued Warren Besart, Roger's Egyptian agent and fixer, during an unholy ceremony involving members of the Carlyle Expedition, which he witnessed.
2) You can go visit the Clive Expedition, currently at Memphis. Sir Clive is affiliated with the Penhew Institute (like the Carlyle Expedition). The late Sir Penhew (killed by the investigators as they defended themselves) was a wicked man, high priest in the UK branch of the Brotherhood of the Black Pharaoh.
3) Most worrisome is that a powerful ancient artefact, the "Girdle of Nitocris", was recently stolen by Omar al-Shakti, the powerful high priest of the Egyptian Brotherhood of the Black Pharaoh. This is supposed to allow the resurrection of Nitocris, the Queen of the Black Pharaoh. (Her mummy was recently found, then lost most mysteriously, by the Clive expedition.)
Your contact and local cult expert, Dr. Ali Khafour of the Cairo Museum, believes there will be an important resurrection ceremony soon. When and where is not clear at this time.
Tony