The work at Salina Cruz presented far greater problems. It has demanded the maximum of engineering skill and an immense sum of money. Here nature had aided in no way and everything had to be done by human effort. On account of severe wind storms it was deemed necessary to construct both an outer and an inner harbour in order to make a perfectly safe anchorage at all times and the work was begun in 1900. The outer harbour is being formed by thrusting two massive breakwaters like immense arms out into the bay with an entrance six hundred feet wide. The longest of these breakwaters will be three thousand feet, consisting of three sections, of different angles, with the convex sides toward the sea. The other is only one-half as extensive. The foundation for these breakwaters is started thirty feet below low water mark and in some places is two hundred feet in width. Upon a rubble foundation immense blocks of concrete and natural rock are placed at random. Then on top are placed regular rows of forty-ton concrete blocks. The amount of material already used and needed to complete this work is almost inconceivable. More than three-fourths of the largest breakwater is already completed. The inner basin will be wholly artificial and will occupy in part the site of the old town of Salina Cruz with an entrance ninety feet wide. Immense dredges are now at work on this basin which will be large enough to accommodate whole fleets of the largest vessels afloat. From two thousand to four thousand men have been and are still employed, the majority being natives. Although the harbour at Salina Cruz is still incomplete, this route was formally opened on January 23rd, 1907. In the presence of a great throng of notables, including the representatives of twenty nations, President Diaz touched a lever which set in motion a steam winch that was used to carry the first load of cargo from a steamer to a freight car. After this car had been loaded it was transferred to Coatzacoalcos and the President touched another lever that set in motion the machinery for unloading the car and transferring the freight to a waiting steamer. In this manner was opened a route that is destined to take a prominent part in the handling of the world’s commerce, and which has cost the Mexican government more than $25,000,000 in gold, and the end is not yet. After four hundred years the dream of Cortez has come true and the isthmian highway is open to the world.