《宋书·志·卷三十》
逛固说： 指工匠制作车轮弓矢多数会毁坏，以及木出现各种灾变怪异。 
班固曰： 盖工匠为轮矢者多伤败，及木为变怪。 
Yuan Gu says: This refers to craftsmen making a lot of defective wheel rims and arrows, and wood experiencing all sorts of strange and weird disasters.