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.

Does Christ possess these same attributes?
What prophecy was fulfilled in the slaughter of the children of Bethlehem?
What are the evidences that one has been born of God?
What did Isaiah say Christ would do with the law?
What great truth therefore follows?
14. What instruction did Abraham give his servant Eliezer when sending him to select a wife for his son Isaac?
How are the nations gathered to the battle of Armageddon?

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