Julius Caesar defeated Ptolemy xii on the Nile on March 27th, 47 B.C. After establishing Cleopatra and her brother, Ptolemy xiii, on the throne of Egypt, Caesar proceeded against Pharnaces whom he defeated at Zela, in Pontus, on August 2nd. How long did Caesar delay at Alexandria before leaving for this campaign ?
The length of his stay after the battle of the Nile is variously estimated. Ferrero says that Caesar remained at Alexandria for two months, leaving on the last day of May. Professor Adcock agrees with Ferrero and so does Carcopino. O. E. Schmidt and Rice Holmes calculate that Caesar left Alexandria on the 7th or 8th of June. Judeich and E. Meyer place the date of his departure on June 20th, while Heitland and Weigall give him a reprieve from active service till the first week in July.