《明史·志·卷三》
十三年四月甲午日，彗星在垒壁阵上出现，侵入室壁之间，渐渐变长三尺多。
十三年四月甲午，彗星见垒壁阵上，入室壁间，渐长三尺余。
In the fourth month of the thirteenth year, on the day of 甲午 (day of the first stem Heavenly Stem, and seventh earthly branch), a comet appeared on Mound Wall, breaking into Wall Star, gradually becoming 3 feet long.