It has now to be considered how the above facts bear upon Egyptian =chronology=. To make a complete scheme of Egyptian chronology we need a complete list of the kings of Egypt, and to know the order in which each succeeded, and the number of years which each reigned. Now, such a list does not exist, for the lists we have only contain selections of kings’ names; and of many a king neither the order of his succession nor the length of his reign is known. The facts at present available do not permit the making of a complete detailed scheme of chronology, but one which is =approximately correct= in many parts of it can be framed. As authorities for the names of the kings there are:—1. The =Royal Papyrus of Turin=, which, when complete, contained over 300 royal names. 2. The =Tablet of Abydos=,[29] made for Seti I, containing seventy-six names. 3. The =Tablet of Ṣaḳḳârah=, containing fifty names. 4. The =Egyptian monuments= of all periods. 5. The King List of =Manetho=.[30] The Turin Papyrus, which was compiled about B.C. 1500, gave the lengths of the reigns of the kings, but unfortunately most of them are broken. Manetho compiled his King List, it is said for Ptolemy II Philadelphus, in the first half of the third century B.C., but, as the work in which it appeared is lost, we only know it by the copies which have come down to us in the =Chronicle of Julius Africanus= (third century A.D.), in the =Chronicle of Eusebius=, Bishop of Caesarea, who died about A.D. 340, and in the =Chronography of George the Monk= (eighth century A.D.). Eusebius himself also compiled a King List, but his results differ materially from those of Manetho as given by Africanus. Manetho divided the kings of Egypt into thirty dynasties, which he arranged in three groups: Dynasties I-XI, XII-XIX, and XX-XXX. He also gave the lengths of the reigns of the kings, and the cities of their origin, Memphis, Elephantine, Thebes, etc.