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.

What other title is given this revelation of God to man?
What was God's design in thus giving the Scriptures?
How did the father show his joy at his son's return?
Who controls the distribution of the gifts of the Spirit?
How is the church at the first advent described?
What will this prophet do when he comes?
What is sometimes of greater value even than money to discouraged souls?

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