process continued, and Egypt never had such prosperity again until Lord Cromer came to resume the work of Augustus. The harvest depended simply on the height to which the Nile rose. The ancient Nilometer at Elephantine records that the Nile rose to an unprecedented height in the latter days of Augustus. Formerly a level of eight ells had meant famine, now it ensured a tolerable harvest. Another inscription found at Coptos gives us the names of the Roman soldiers who built reservoirs of water along the great roads. Then the trade with India along the Red Sea first began to grow great. Whereas in the time of Cleopatra hardly twenty ships sailed to India in a year, there was already in Strabo’s day (about A.D. 18) a great fleet of Indiamen. Taxes on exports and imports returned a huge revenue to the imperial purse. The prefect who represented his master on the throne of the Ptolemies was in a difficult position. To Rome he was a mere servant, to the Egyptians something like a god. Against these flattering influences Gallus the poet had not strength to resist. He allowed statues to be erected to him and even had his own achievements engraved upon the pyramids. A traitorous friend reported these indiscretions at Rome. Augustus was content to recall him and forbid him to live in the provinces or to enter his presence. But the officious senate voted his condemnation to banishment, and confiscated all his property to Augustus, whereby Gallus was driven to suicide. Then Augustus was sorry and complained that it was hard not to be able to scold one’s friends like a private man. This was the first case of that disease known as _delatio_ (informing) which was afterwards to become such a pest under the Empire. It is satisfactory to learn that the informer was very rudely treated in Roman society. From Egypt, as a base, expeditions were made in the time of Augustus to Arabia and the Soudan. Arabia Felix was to the Romans a kind of Eldorado of boundless wealth, as Horace writes to a friend who was joining the campaign. The Arabs brought their incense into the Syrian markets and already traded with India from Aden, but the national wealth of the country was exaggerated and its difficulties unknown. This expedition of 25 B.C., which was on a very large scale and included contingents from Judæa, was one of the few deliberate wars of conquest ever planned by Augustus. He learnt a lesson by its failure in the burning and trackless deserts. The other campaign against the black Æthiopians of the Soudan under their warlike but one-eyed queen Candace was more successful. Petronius the legate penetrated as far as the Second Cataract and sent a thousand prisoners to Rome, but Augustus seems to have been content to make the First Cataract his southern frontier.