"In one of the tombs at Gizeh, a great functionary of the first period of the VIth Dynasty (_circa_ 3300 B.C.,) takes the title of: 'Governor of the House of Books.' This simple mention incidentally occurring between two titles, more exalted, would suffice, in the absence of others, to show us the extraordinary development which had been reached in the civilization of Egypt at that time. Not only had that people a literature, but that literature was sufficiently large to fill libraries; and its importance was so great, that one of the functionaries of the court was especially attached to the care and preservation of the royal library. He had, without doubt, in his keeping with the contemporaneous works, the books written under the first Dynasties, books of the time of Mena and perhaps of kings anterior to Mena. The works in the library would be composed of religious works; chapters of the Book of the Dead, copied after authentic texts preserved in the Temples; scientific treatises on geometry, medicine and astronomy; historic books in which were preserved the sayings and doings of the ancient kings, together with the number of the years of their lives and the exact duration of their reigns; manuals of philosophy and practical morals and perhaps some romances," etc.[65] The learned of that ancient people followed special lines of study and thought. There was a division of them known as the _Herseshta_, or Teachers of Mysteries. These were subdivided, among other divisions into: "The Mystery Teachers of Heaven," or, the astronomers and astrologers; "The Mystery Teachers of All Lands," or, the geographers and those who studied other peoples and countries; "The Mystery Teachers of the Depth," likely, the possessors of a knowledge of minerals, mining, varieties of rocks, etc.; "Mystery Teachers of the Secret Word," doubtless those interested in abstract thought, religious metaphysics and philosophy; "Mystery Teachers of the Sacred Language," men who devoted themselves to grammar and the form of writing; "Mystery Teachers of Pharaoh, or, 'of all the commands of Pharaoh,'" wise men, likely private scribes and secretaries of the king; "Mystery Teachers who examine Words," likely learned men who sat as judges to hear complaints, and sift the opposing statements of litigants and witnesses. The learned writers known as scribes were also divided into many branches.[66]