(765 ILCS 505/8) (from Ch. 96 1/2, par. 158)

Sec. 8. Every person purchasing lead mineral shall keep a book, in which he shall keep an account of all lead mineral purchased by him, stating clearly the amount, from whom and time when purchased, and the place where it was dug; and for the purpose of ascertaining such facts, he shall make diligent inquiry of the person offering such mineral for sale, and if satisfactory answers are not given, it shall not be lawful for him to buy the same.

(Source: R.S. 1874, p. 709.)