"If you are still in Syria," said the ambiguous mandate, "retreat without delay; but if, at the receipt of this epistle, you have already reached the frontiers of Egypt, advance with confidence, and depend on the succor of God and of your brethren." The experience, perhaps the secret intelligence, of Amrou had taught him to suspect the mutability of courts; and he continued his march till his tents were unquestionably pitched on Egyptian ground.

He there assembled his officers, broke the seal, perused the epistle, gravely inquired the name and situation of the place, and declared his ready obedience to the commands of the caliph.
After a siege of thirty days, he took possession of Farmah or Pelusium; and that key of Egypt, as it has been justly named, unlocked the entrance of the country as far as the ruins of Heliopolis and the neighborhood of the modern Cairo.
On the Western side of the Nile, at a small distance to the east of the Pyramids, at a small distance to the south of the Delta, Memphis, one hundred and fifty furlongs in circumference, displayed the magnificence of ancient kings.

Under the reign of the Ptolemies and Caesars, the seat of government was removed to the sea-coast; the ancient capital was eclipsed by the arts and opulence of Alexandria; the palaces, and at length the temples, were reduced to a desolate and ruinous condition: yet, in the age of Augustus, and even in that of Constantine, Memphis was still numbered among the greatest and most populous of the provincial cities.

The banks of the Nile, in this place of the breadth of three thousand feet, were united by two bridges of sixty and of thirty boats, connected in the middle stream by the small island of Rouda, which was covered with gardens and habitations.

The eastern extremity of the bridge was terminated by the town of Babylon and the camp of a Roman legion, which protected the passage of the river and the second capital of Egypt.