Canal of the Pharaohs

The Canal of the Pharaohs, also called the Ancient Suez Canal or Necho's Canal, is the forerunner of the Suez Canal, constructed in ancient times and kept in use, with intermissions, until being closed for good in 767 AD for strategic reasons during a rebellion. It followed a different course from its modern counterpart, by linking the Nile to the Red Sea via the Wadi Tumilat. Work began under the pharaohs. According to Darius the Great's Suez Inscriptions and Herodotus, the first opening of the canal was under Persian king Darius the Great, but later ancient authors like Aristotle, Strabo, and Pliny the Elder claim that he failed to complete the work. Another possibility is that it was finished in the Ptolemaic period under Ptolemy II, when engineers solved the problem of overcoming the difference in height through canal locks.
Egyptian and Persian works.
At least as far back as Aristotle there have been suggestions that perhaps as early as the 12th Dynasty, Pharaoh Senusret III (1878–1839 BC), called Sesostris by the Greeks, may have started a canal joining the River Nile with the Red Sea. In his "Meteorology", Aristotle wrote:
One of their kings tried to make a canal to it (for it would have been of no little advantage to them for the whole region to have become navigable; Sesostris is said to have been the first of the ancient kings to try), but he found that the sea was higher than the land. So he first, and Darius afterwards, stopped making the canal, lest the sea should mix with the river water and spoil it.
Strabo also wrote that Sesostris started to build a canal, as did Pliny the Elder (see quote further down).
However, the canal was probably first cut or at least begun by Necho II (r. 610–595 BC), in the late 6th century BC, and it was either re-dug or possibly completed by Darius the Great (r. 550–486 BC). Classical sources disagree as to when it was finally completed.
Darius the Great's Suez Inscriptions comprise five Egyptian monuments, including the Chalouf Stele, that commemorate the construction and completion of the canal linking the Nile River with the Red Sea by Darius I of Persia. They were located along the Darius Canal through the valley of Wadi Tumilat and probably recorded sections of the canal as well. In the second half of the 19th century, French cartographers discovered the remnants of the north–south section of Darius Canal past the east side of Lake Timsah and ending near the north end of the Great Bitter Lake.
Pliny the Elder wrote:
165. Next comes the Tyro tribe and, on the Red Sea, the harbour of the Daneoi, from which Sesostris, king of Egypt, intended to carry a ship-canal to where the Nile flows into what is known as the Delta; this is a distance of over 60 miles. Later the Persian king Darius had the same idea, and yet again Ptolemy II, who made a trench 100 feet wide, 30 feet deep and about 35 miles long, as far as the Bitter Lakes.
Although Herodotus (2.158) tells us Darius I continued work on the canal, Aristotle (Aristot. met. I 14 P 352b.), Strabo (Strab. XVII 1, 25 C 804. 805.), and Pliny the Elder (Plin. n. h. VI 165f.) all say that he failed to complete it, while Diodorus Siculus does not mention a completion of the canal by Necho II.
Macedonian, Roman and Islamic works.
After the death of Alexander the Great, the general Ptolemy gained control of Egypt, declaring himself Pharaoh and beginning the Ptolemaic dynasty. His son, the 2nd leader of that dynasty, Ptolemy II took up the canal work again, but also stopped because of the differences of water level. Diodorus, however, reports that it was completed by Ptolemy II after being fitted with a water lock.
Ptolemy II is credited by some for being the first to solve the problem of keeping the Nile free of salt water when his engineers invented the lock around 274/273 BC.
In the 2nd century AD, Ptolemy the Astronomer mentions a "River of Trajan", a Roman canal running from the Nile to the Red Sea.
Islamic texts also discuss the canal, which they say had been silted up by the seventh century, but was reopened in 641 or 642 AD by 'Amr ibn al-'As, the Muslim conqueror of Egypt. The canal was in use until closed in 767 in order to stop supplies reaching Mecca and Medina, which were in rebellion.
Aftermath.
Thereafter, the land routes to tranship camel caravans' goods were from Alexandria to ports on the Red Sea or the northern Byzantine silk route through the Caucasian Mountains transhipping on the Caspian Sea and thence to India.
During his Egyptian expedition, Napoleon Bonaparte encountered the canal in 1799.