Actual work on the canal was begun in 1858 and such rapid progress was made that it was completed in the autumn of 1869, and opened to the commerce of the world with magnificent ceremonies, lasting for several days. Religious ceremonies, in which priests of the Catholic Church, the Greek Church, and the Moslem faith united, were followed by a naval parade representing the European powers and the United States, and the whole concluded with a brilliant series of fêtes and entertainments at Cairo. As the originator of the canal, De Lesseps, was a Frenchman, and as France had been the chief promoter of the enterprise, the place of honor at these ceremonies was naturally given to the Empress Eugénie, who went to Cairo as the representative of the French nation; while to De Lesseps, as naturally, was given the next place, a position which he filled with equal dignity and modesty, winning "golden opinions from all sorts of people." The Suez Canal, though a vast and important undertaking, presented almost no engineering difficulties to be overcome. At Port Saïd, the Mediterranean entrance to the canal, two great piers, to serve as breakwaters, were built of artificial stone, projecting into the sea; the western, a distance of 6,940 feet, the eastern 6,020 feet, and enclosing an area of 450 acres; thus providing a safe and commodious harbor. At Suez, the Red Sea terminus of the canal, a less formidable defense was needed; but the necessary docks and buildings called for a considerable outlay. From Port Saïd to Suez the land is almost a dead level; the few sand-dunes that break the monotonous uniformity of the isthmus nowhere reach a greater height than fifty or sixty feet. Along the middle line of the isthmus there was a series of depressions; some shallow, and others, the bottoms of which were lower than the level of the sea. Although these depressions were at all times dry, yet they were called "lakes," and as such figure on the maps, where we read the names "Lake Timsah," "The Bitter Lakes" and others. They were found to be thickly incrusted with salt on the bottom and sides, indicating that at one time they had been filled with sea-water; it is indeed must probable that the whole isthmus was at a very remote period entirely submerged. In the construction of the canal these depressions were made to play a very important part. The line of the canal was carried directly through them; the shallower were brought to a sufficient depth by dredging; the deeper were simply filled with water and required nothing more for safe navigation than an indication of the channel by buoys. Thus, in the whole length of the canal, reckoned at 88 geographical miles, there are 66 miles of actual digging; 14 miles of dredging through the lakes; and 8 miles, where neither digging nor dredging was required.