How early was this sacrificial system known?

Answer

"By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he
was righteous, God testifying of his gifts." Heb. 11: 4. See Gen. 4: 3-5; 8: 20.

How are the present effects and future results of chastisement contrasted?
How early did Timothy know the Scriptures?
22. How many of the commandments is it necessary to break in order to become a transgressor of the law?
Was the Sabbath intended as a day for public worship?
12. Are men's hearts now \"failing them for fear, and for looking after those things which are coming on the earth\"?
Do the dead know anything?
When our friends fall asleep in death, with what words are we told to comfort one another?

Questions & Answers are from the book Bible Readings for the Home Circle