《宋史·列传·卷二百零九》
到勾林滩，渐渐接近龙尾洲，远远望去军船旗帜纷乱，张贵部队高兴得跳跃，举起流星火告示他们，军船看见火光马上向前迎进，等情势接近将要汇合，而来船都是北兵。
至勾林滩，渐近龙尾洲，遥望军船旗帜纷披，贵军喜跃，举流星火示之。军船见火即前迎，及势近欲合，则来舟皆北兵也。
As they reached Goulin Shoal and approached Longwei Isle, they saw standards flying on the warship in the distance. Zhang Gui’s men were delighted and leapt around, holding up a star-shell to signal to them. Seeing the star-shell, the warship came towards them. However, when they drew nearer and were about to come alongside, the ship proved to be an enemy vessel.