Archaeologists yesterday doscovered tombs of a pharaonic butler and a scribe that have been buried for more than 3,000 years — proof that Egypt's sands still have secrets to open.Even though archaeologists have been exploring Egypt for more than 150 years, what is found for now consists only one third, of what can be found."The sands of Saqqara reveal lots of secrets," said Egypt's antiquities chief, Zahi Hawass, as he showed reporters a 4,000-year-old mud brick tomb that belonged to a scribe of divine records, Ka-Hay, and his wife.The tomb, along with the butler's 3,350-year-old