would likely not exceed an average cost of two hundred thousand dollars a mile as cheap stone can easily be obtained from the granite islands nearby, in the Chusan Archipelago. A wall of forty miles on each side that is eighty miles in all will cost sixteen million dollars or thereabouts. And considering that 200 or 300 square miles of Haimen, Tsungming, and the Tungsha banks could be converted into arable land within a short time, the expense of building the wall is well justified. Furthermore, the construction of this wall means that there will be a safe and permanent approach for a world. port in Shanghai as well as a deep outlet for the Yangtse. See Map V.
The regulating wall on the right side should be built from the junction of the Whangpoo by prolongation of its right jetty describing a gentle curve into the depths of the South Channel and turning toward the opposite side and cutting through the Blockhouse Island into the Middle Channel, then running eastward right into the five-fathom line southeast of Shaweishan Island. The left wall would be a continuation from that of Tsungming at Tsungpaosha Island parallel with the right wall by a distance of about two miles. This wall should curve to a point at or near Drinkwater Point at Tsungming Island, then project into the five-fathom line at the open sea passing by just at the south side of the Shaweishan Island. A glance at the map here attached would be sufficient to show how the future outlet of the Yangtze as well as the future approach of Shanghai should be. The two
