“As we advanced, the canal in some parts became narrower, and the banks had rather more of an artificial appearance than where we first entered it, being occasionally pretty high; but still the winding course led to the inference, that as yet the canal was for the most part only a natural river, modified and regulated by sluices and embankments. The distance between the stone piers in some of the flood-gates was apparently so narrow as only just to admit the passage of our largest boats. The contrivance for arresting the course of the water through them was extremely simple; stout boards, with ropes fastened to each end, were let down edgewise over each other through grooves in the stone piers. A number of soldiers and workmen always attended at the sluices, and the danger to the boats was diminished by coils of rope being hung down at the sides to break the force of blows. The slowness of our progress, which for the last week averaged only twenty miles a day, gave us abundant leisure to observe the country.... “We now began to make better progress on the canal than we had hitherto done. The stream, though against us, was not strong, except near the sluices, where it was confined. In the afternoon we stopped at Kai-ho chin (_i.e._, River-opening mart), so called, perhaps, because the canal was commenced near here. On the 28th we arrived at the influx of the Yun ho, where the stream turned in our favor, and flowed to the southward, being the highest point of the canal, and a place of some note. The Yun ho flows into the canal on its eastern side nearly at right angles, and a part of its waters flow north and part south, while a strong facing of stone on the western bank sustains the force of the influx. At this point is the temple of the Dragon King, or genius of the watery element, who is supposed to have the canal in his special keeping. This enterprise of leading in this river seems to have been the work of Sung Lí, who lived under Hungwu, the first emperor of the Ming dynasty, about 1375. In his time, a part of the canal in Shantung became so impassable that the coasting passage by sea began to be most used. This was the very thing the canal had been intended to prevent; Sung accordingly adopted the plan of an old man named Píying, to concentrate the waters of the Yun ho and neighboring streams, and bring them down upon the canal as they are at present. History states that Sung employed 300,000 men to carry the plan into operation, and that the work was completed in seven months. On both sides of us, nearly level with the canal, were extensive swamps with a shallow covering of water, planted with the Nelumbium; they were occasionally separated by narrow banks, along which the trackers walked, and the width of the canal sometimes did not exceed twenty-five yards. On reaching the part which skirts the Tu-shan Lake, the left bank was entirely submerged, and the canal confounded with the lake. All within sight was swamp,