When all had assembled, the King proclaimed as follows: “I know Zhuge Liang is too full of ruses for us to conquer him in a fight; we should only fall victims to other base devices. However, we must remember that his soldiers have marched far and the weather is sultry, which are factors in our favor. Beside, River Lu is our rampart. We will have boats and rafts on the south side, and we will build a mud wall. With such good defenses we can afford to wait and see what the enemy intends.”
His speech met with approval, and his plan was carried out. The wall was supported by the hills and strengthened by fighting turrets, upon which were placed large bows and crossbows and arrows and stones. The defenses looked as if they were permanent. Moreover, each ravine sent supplies in plenty. And having made these preparations, Meng Huo felt comfortable and safe.
Zhuge Liang had advanced, and his leading division was now close to the river. Spies came back to report: “No boats or rafts can be found to cross, and the current is too strong to think of fording. Beside, we can see the formidable defenses on the farther bank, the mud wall and the turrets all fully manned.”
The weather was burning hot, for it was the fifth mouth, and the soldiers could not tolerate their armor nor even their clothing. When Zhuge Liang had inspected the river, he returned to his tent and assembled his officers, to whom he read this order: “The enemy is securely established on the south bank ready to repel our attack. Yet, having come so far, we cannot return empty. For the present you will all seek what shelter you can find in the forests, and rest and refresh your people.”
Then he sent Lu Kai to a distance to select a cool stretch of thirty miles, and there he made four stockades. Within the stockades he built huts for the soldiers and sheds for the horses, so that they were sheltered from the intense heat. The four camps were stationed by Wang Ping, Zhang Ni, Zhang Yi, and Guan Suo.
However, Jiang Wan, observed these shelters and went to Zhuge Liang, saying, “These shelters of Lu Kai are very unsuitable. He has made the same mistake as that which led to the defeat of the First Ruler at the hands of Wu. He has not taken into account the surroundings of the stockades, and if the Mangs should come over and start a fire, there could be no rescue.”
“Do not anticipate trouble,” said the Commander-in-Chief, smiling. “I have provided against all such dangers.”
Jiang Wan did not know what the chief meant to do, but he said no more. Then Ma Dai arrived from the Lands of Rivers, and he brought summer medicines and further supplies of grain. He saw Zhuge Liang, and then proceeded to distribute the supplies he had brought according to orders.
Then Zhuge Liang said, “What force have you brought?”
“Three thousand,” was the reply.
“My people are weary and worn out; I want to use yours. You have no objections?”
“Of course not; they are equally government troops. They are ready even to die for you if you wish.”
“This Meng Huo is established on the river, and we have no means of crossing. But I am anxious to intercept his supplies, so that his troops may mutiny.”
“How can you do it?”
“Some fifty miles lower down River Lu there is a place called Shakou, where the current is slow; you could cross there on rafts. I wish you and your soldiers to cross and cut the road of supplies. After that you are to arrange with the two leaders — Dongtu Na and Ahui Nan — whose lives I spared, to be your allies on the inside, and we shall succeed.”
Ma Dai went off gladly enough, and marched his troops to Shakou, where they set about the crossing at once. And as the water was shallow, they did not trouble to make rafts, but just tucked up their clothes and waded in. But half-way across, the men began to fall over; and when they had been rescued and taken to the bank, many of them began to bleed from the nose and mouth and died. In great alarm, Ma Dai sent hasty messages to Zhuge Liang, who called in the native guides and asked what this meant.
They told him, “It happens so every year. In the hot season, poisonous miasma collects over the waters of the River Lu, especially during the heat of the day. Anyone who drinks the water will surely die. Travelers who wish to cross have to wait till night, because the cooler waters do not breathe out the poisonous vapors. Further, the crossing should be attempted on a full stomach.”
Zhuge Liang bade the local guides point out the best crossing place. He sent some well-seasoned soldiers to Ma Dai to lash together poles into rafts at Shakou, and in the night the crossing was safely accomplished. Further, the guides then led the three thousand men of Shu over to where the grain road of the Mangs led through a narrow valley, called Jiashan Gorge, where, for part of the way, only single file was possible as the road was only wide enough for a soldier and a horse.