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. Remnants of an ancient west-east canal, running through the ancient Egyptian cities of Bubastis, Pi-Ramesses, and Pithom were discovered by Napoleon Bonaparte and his cadre of engineers and cartographers in 1799. Other evidence seems to indicate the existence of an ancient canal around the 13th century BC, during the time of Ramesses II. Later construction efforts continued during the reigns of Necho II, Darius I of Persia and Ptolemy II Philadelphus. Psammetichus left a son called Necos, who succeeded him upon the throne. This prince was the first to attempt the construction of the canal to the Red Sea—a work completed afterwards by Darius the Persian—the length of which is four days' journey, and the width is such as to admit of two triremes being rowed along it abreast. The water is derived from the Nile, which the canal leaves a little above the city of Bubastis, near Patumus, the Arabian town, being continued thence until it joins the Red Sea. This [the canal from the Nile to the Red Sea] was begun by Necho II [610 BCE – 595 BCE], and completed by Darius I, who set up stelae c. 490 [BCE], ... and later restored by Ptolemy II Philadelphus, Trajan and Hadrian, and Amr ibn el-'Asi, the Muslim conqueror of Egypt. Its length from Tell el-Maskhuta to Suez was about . Shipping over the Nile River and from Old Cairo and through Suez continued further through the efforts of either 'Amr ibn al-'As, Omar the Great, or Trajan. The Abbasid Caliph al-Mansur is said to have ordered this ancient canal closed so as to prevent supplies from reaching Arabian detractors. References Trade History of international trade Trade Ancient international relations Economic history of Egypt