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 did Noah show his faith in this message?
What will result if correction is withheld?
What reason is given for making the new covenant?
Did Christ have anything to do with creation and the making of the Sabbath?
22. What did Augustine, the father of this theocratical or church-and-state theory, teach concerning it?
8. After commending this church for their good works, what charge did the Lord bring against them?
Why is sorrow better than laughter?

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