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 use of this prophecy by the Apostle Peter shows that it referred to Christ?
Through what was the original creation wrought?
How did the aged prophetess Anna express herself at the sight of Jesus?
What tender, filial regard did Christ manifest for His mother in the hour of His death?
Of what besides a knowledge of God as Creator, is the Sabbath a sign?
What means will be employed to compel all to receive this mark?
What name is given to the second state of the church?

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